Easy Percentage Trick you were Never Taught at School! 

Did you get the answer correct?

He would have

It's a neat trick, but communicative law could be explained more intuitively. For percentages it would be .01 a b = .01 b a E.g.: .01 x 48 x 50 = 48% of 50 = .01 x 50 x 48 = 50% of 48 = 24

it only works when the numbers divide nicely. which is hardly ever the case in the real world. so i wouldn't do it

Do you mean 90s?

whats 23% of 77

@@BangPhotography 17.71. How I did it was 2.3 x 7.7.

@@moqiiz5013 whatttt, nah im sticking to the calc in my phone

Used to find 1% then just multiply out.. So 0.77 x 23 👍

@@annd8396 yeh i cant do 77 x 23 anyhow

Home schooling is worth improving.Mainstream schooling is selective and teaches you only how to learn.

people who don’t understand the joke that he is not 68:

Then how old is he actually¿

@@Hyunjijnnn.n probably like 16

And me!

Me, too.

Amen brother

Me too and I don’t even have balls!

My dad ,god rest his soul ,taught me the easy way to figure a tip (15%) 10 x the number ,than half,add together. They use to go out alot,i was 7

Yup. And I'm one. I dreaded math in school. Was held back in 2nd grade because of it. I couldn't do simple equations. All through high school as well. I'm 58 now and still suck at math. But I just got a little better!

Michael, I agree and I "did well" but that doesn't mean that it didn't cause me great anxiety. You are so right about math teachers, I have the highest regard for them.

No kidding. In school, I was always top of the class except for math. By middle school I was in college prep except for math, where I was in the remedial class in 8th grade. After that I wasn’t required to take math. Tried a class in college, lasted one day. After first grade, where the teacher was literally brutal, I was so traumatized about math. I still have number dislexia which is perhaps purely from fear, IDK. But this little video has given me such relief! Maybe, at the age of 62 I can get past my fears and have a fully functioning left brain.

I totally agree - you get put off right from the start because none of it is obvious & seems like a mystery....so your mind just decides it wants nothing to do with math !! Having simple 'tricks' which then get explained will let you gradually accept the subject without fighting it !!!

Me too lol 🏴󠁧󠁢󠁥󠁮󠁧󠁿

If U know percentages already, U didn't need to know this

@@intergalacticdegengypsy6135 maybe he thought this method was more efficient so he is saying thank you

I was like that genius except I had a 100ms ping so I was never able to get it.

@@minecat81 100ms is good

I was that kid. I never studied, just memorize and solve it fast

@@ilikeoranges8784 not that much

@@minecat81 I am like that genius except that I have a ping of a freaking goddamn whole second, not only in math but in everyday life

Lot of "teachers" are actual idiots.

@@katiesimmons5877 only an idiot would say that , and i’m sure you’re not an idiot ... are you ?

@@aussiesurfer805 You sound like an idiot. Goid luck with that! 🤣🤣🤣🤣

So, if we teach our kids tricks, are they actually learning what math is? Meaning, do they understand what a percent of anything is based on this trick?

I was paying attention in school too, just not to the teacher.

Hope you got the job. Good luck. 🙂

What is your bachelors degree in? Modern dance?

And still, this will only work if the numbers make some sense. If you had to take 16% of 29 or 29% of 16 you'd still be stuck. Taking 75% of 60 is easy, but what if you had to take 75% from 75? While a nice trick, your mileage will vary.

@@Hans-gb4mv Right. Clickbait.

um...no it isn't

Math tricks are great. The only ones I've learnt are from my family, school never taught them.

But it is only useful for a tiny fraction of problems. Basically the right hand number has to be a multiple of 25, so 4% of problems fall into this category. And it doesn't save that much time unless the percentage is a multiple of 2, so now we are down to 2% of all problems. Not particularly useful.

Then you did not take your education nearly seriously enough. You can lead a horse to the water, but you can't make him do his homework.

@@TurdFurgeson571 He was just trying to make ajoke, You didnt have to destroy him

@@TurdFurgeson571 take a joke for once

@@TurdFurgeson571 but the thing is, this guy was trying to teach us something, while the school teachers were just killing time until payday

Same here 😊

dude it only works easier to work out in your head if the numbers dont have decimal points after them,and the percentage is easy to define as a fraction, try this one 6.9876% of 2,000,586.657 Try the trick and if you took a maths exam and had to show how you worked it out line by line and wrote what you must multiply backwards still same answer then divide by 100 for the answer you would still fail example if you were 5 years old 10% of 100 ok you know its ten but you have to wright 10X100 underlined with 100 under in other words divide by 100, and if you were taught reversing it was somehow correct and wrote 100x10 underlined with 100 under in other words divide by 100 you just got big fatX not correct as it is not the correct working for the question you were asked

@@christopherhines2718 The thing is because order doesn't matter with multiplication, something we are taught in school it wouldn't be wrong. And to all those who are saying why were we not taught this in school you were, you just didn't realise it as you were taught it in two parts. Part 1 is that a percentage is a simple multiply and the divide by 100 problem and part 2 being that with multiplying and dividing it doesn't matter which order you do them.

@@chrisfortune1813 someone finally said it

Good for you! I just turned 60 - never too old to learn and improve your life. I struggled with percentages since forever, but with this 'tool' I should be good to go. All the best for you.

@Pepsi Hey, I’m (re-?)learning math, too! Nearing my 30’s, hated math in school, and also was in grade 5 of arithmetic when I got done with that. But now, I have reasons (aka hobbies) to encourage learning math... now I actually find it a little fun! Thank you so much for sharing. It’s cool knowing that there’s others like us. 😎

I'm in a similar situation and when I graduated we only need to 10 maths grade 10 and I barely passed it. But now that I'm older, I find one to learn these tricks, it's actually really really fun

I also am trying to educate myself starting with Algebra with about a 6th grade math level. I found some CD's called the "Math tutor" it is very easy to follow and go all the way up to advanced calculus. The price isn't terrible but it isn't great also :/ I bought them before i realized RU-vid has just as much out there but they were of great help at the time none the less.

Awesome! 👏 I like math - wrong or right and is behind most patterns in our world and cosmos ie archeological buildings incl pyramids, human body, and star systems even snow flakes.

That was fun.

Its not wrong if it works everytime.

@frederick Hughes thanks for your service! Lots of people have similar stories. Heard about a vet in his 40s that was homeless and giving his assistance checks to the mother of his child for 10 years. Turns out the baby wasn't his and now they want him to pay it all back due to the fraud and she's off the hook. Sometimes life is the best teacher. The system is built to beat you up and swallow you whole. Knowing how it all works and using it to your advantage is the best way to go

@frederick Hughes Frederick it is not you who is stupid, it's that teacher with such a closed brain. Teachers can be so dumb about the things they say to students. I was always a smart kid, a good student, because I liked school. I've seen through life that the best students are not always the 'smartest'.

@Frederick Hughes If a cat loves you, then you are a very special person indeed. I can't think of a smarter choice than choosing to be happy.

So funny.....u r ridiculous

@@janwhite9381 Aussie Aussie Aussie! Oi oi oi!!

Yeah let’s not

yep love a guy with an accent....well certain ones

Midwest USA Too busy focusing on what words he's saying, let alone the content. Didn't even realize it was Australian. Man, this Pandemic's been rough. SMH multiple times for everyone.

I suppose it only really makes it easier in very specific situations when working with multiples of 10 or 25. Still useful to know though.

@President Joe Biden. the third 10& of people know that.

You know, so true I wouldn't have need to do so many hours of study.

Really

You are a genius man :) This is great! 12% of 3 = 1 * 0.3 + 2*0.03 = 0.36 41% of 7 = 4 * 0.7 + 1*0.07 = 2.87 57% of 12 = 5 * 1.2 + 7*0.12 = 6.84 you are awesome. Thanks a lot.

Very good one.

Even easier, since you're multiplying any way....1% x the percent sought....43% of 60 = 1% of 60 x 43 = .6x43 = 25.8

Uhhh isn’t yours just the standard way all multi digit multiplication is done in the head?? ... 100, 10, 1 then added? This video is essentially pointing out the factors can be reversed for percentages. Which does not occur to many people at all.

I find it even easier to explain as divide by 100 (move decimal twice) and then multiply by the percent. Which is basically what you're doing but with a touch of trick within a trick.

Dude, I’ll be 50 soon. I consider myself to be pretty smart. Now I realize, I’m not

It stops being so simple when you need to find 17% of 43. Math classes teach you the ways that will always work like the is/of=P/100 equation so that you can sit down and figure out the answer no matter what. If they just taught everyone the way this video shows, most people would struggle when the numbers aren't nicely rounded to easy percentages like 1/2 or 3/4.

Because they wanted you to fail.

Yes...

@@LunaFaye17 7.31 and no I didn't use a calculator or Google. I'm just a freak for simple fractions.

Schools were made so the masses can be controlled easily, ask the bureaucrats whom first came up with the school idea so they can get rid of their children in exchange for more free time. You'll be taught alot in school but you'd still be dumb, most people don't even know how to manage their finances and end up in debts and poverty because school intentionally avoid teaching money/risk management so the majority of the students screw up when they get employed without basic knowledge of finances. That's works for bureaucrats too, they suck money out of other people's ignorance. That's simply why school sucks. And why most people screw up their future. That's where the role of parents comes in handy, if you wanna grow an intelligent individual with enough experience to tackle the hardships of school and future business the school shall start from age 0, and extend to year 5. At this time your child should be capable and you'll be proud of them for the rest of your life without caring too much about them. 5 years of solid saising in exchange for a 20-40 years of toxic relationship and screwed up life decisions.

It's a neat trick but it rarely helps you. If I asked you to calculate 18% of 36, it really doesn't help to switch it round.

@@tarrek exactly. This is a really situational trick. I prefer to break down percentages. Like 16% is 10% + 5% + 1%. 10% is easy, 5% is half that, and 1% is easy. That's what I thought the video was going to do

Honestly, every time I try to teach some shortcuts, there are always parents with arguments like "do not confuse the kids with too many options". Well, then.... On the other hand, it is not really that much faster than calculating 16*25 when knowing your multiplication table (which is advisable in either case). This "trick" is simply an application of the commutative law. It is nice, but not really a game changer. You could also go for (16/4)% of (25*4), which gives 4% of 100. Distribution law in application.

try 23% of 412

Horrible to be frightened. I avoid any maths even now. Hate it.

Thats gotta suck. I always hated when I had to write a story. Its not like I didn't have an imagination but I think my problem is unlike math, there was no right answer and that honestly followed me through life.

The gravity changing music from Super Mario would fit in nicely with it.

Ditto, but a couple of years younger.

@frederick Hughes You comment made me almost choke on my saliva

No worries Molly, most teachers are incompetent, judgemental assholes. In 8th grade I was told to learn to be a janitor because I was stupid, and this from a guidance counselor . I ended up with a Masters degree and became a pilot and a millionaire. Never let others judge you. I too am now 70 years old. We win, they are dead.

@frederick Hughes You rock Fred.

@@billsheehy1 sweet!

8?

@@suryaprakashganta Your Jedi skills serve you well. 👍🏻

I am amused that there are no units attached to the number. “My life is 8 better.” Uh... sure... 🥴

@@brandonburum8279 I know, but 8 better of anything is better than nothing. 😉

@@brandonburum8279 (32% of 25)% easier... There. Fixed it.

Same here

What's 13% of 41 using this fake trick? You can go back to feeling less smart now.

I wish I'd had a maths teacher like this lovely man in high school instead of the screeching demon we had who scared me off maths forever. 😁

This "trick" only makes it easier when certain numbers are being used (25, 50, 75, 100, etc,), otherwise it's worthless. For instance, try and use this trick on: 16% of 44, or 28% of 92. Not very helpful, right?

My math teacher taught us an easy way. Divide the number by 100 to find out what 1% would be and then multiply the 1% by the percentage given. It's incredibly easy and logical no matter what the numbers are.

haha .... mmmm ....ok ok - maybe ? but- me-not-sure-if-u-taking-the-p1ss-or-not ... in case you are actually being half serious, or even fully serious (that’s 50% or 100% of the value of your serious - not mine .. my serious value is different to yours because of course the value of anybodies “serious”’is relative ) well you see it’s like this ,, understanding what a % actually is i.e a number x another number/100 is (in itself or at its core ) a very simple concept.. So simple in fact that even a “potential”maths whiz would probably be able to understand the theory of % and therefore be able to apply different algebraic combinations that hold the same theory true, if they were faced with the task of having to calculate a % mentally that at first appearance seemed a little tricky to do without a calculator or at least a pen and paper ... actually to be honest i think most maths whizzes AND even potential maths whizzes(like what you seem to believe you are) wouldn’t have to be faced with an actual challenge to pull some different combos out of their “mental maths fun bag of awesome sick tricks”, they would probably just do that kind of thing for fun, ya know instead of hanging out at the mall or typing in youtube comments sections in between porn sessions at their mum’s house ....... having said that, a potential maths wizard might not come up with too many alternate algebraic combinations, after all they’re not a maths whiz yet they just have untapped potential .... but on the other hand, one can only assume that at some point in there life somebody has taught them how to calculate a % and being a potential maths whiz you could only assume that they would be at least 1 or 2 % interested (but for most potential maths whizzes i’d give a better guess of >75% interested in somebody talking about maths with them ) ... and it’s such a simple concept that even at 1% interest level, a potential maths whiz would be able to understand what a % is and how to calculate one,... this would then lead to a realisation that you don’t really have to be a whiz to know that you could use different ways to make it easier to calculate some % values mentally .... ( or as the maths whizzes would probably say “different algebraic combinations that independently are able to hold the same theory true” - or something like that anyway ) mmmm ... sure does make you think ... hey ?? makes me think you may not have been a potential whiz after all , but then again how could we possible know that, we’re not math-magicians are we ? .... haha - of course we’re not ...

@@aussiesurfer805 That's 100% verbiage. 😂

@@billyandrew aaahhh very good . ty .... I always give 110% to 50% of 100% of things that I do ....

I am so glad I am not the only that has math anxiety. I've been telling people for years that it is a true anxiety and no one believes me.

Lol I'm the same I'm good at everything except math

bruh this is a kids problem XD

I’m looking at this to see if it would help my students

Which is a shame. Teachers get dismayed when the kids don't find the solution by doing it _their way_ ? Shouldn't matter at all _how_ they find the answer; what matters is that they're able to come up with the correct answer.

In my experience the education system and teachers were, and still are a pain in the derriere. 🤬

The teacher did not know.

Thanks mate

Really? Then what's 13.2% of 289.22?

@@mynameisgladiator1933 It's ;alkjd;fakjdfienr

@@mynameisgladiator1933 Didn't manage it. I got the 38 but did the decimle point wrong. More practice needed but enjoyed the effort. I should have whole numbered them then worried about the decimile rather than do it with the point in place.

@@gm2407 You missed the point of my question which was rhetorical. The point I was making is that this "helpful" method is not helpful and only helpful in special cases. The truth is computers are good for things and people for different things. I'll let a calculator calculate calcs and I'll decide the MEANING of the calcs, and how to use them etc., like all good engineers.

@@mynameisgladiator1933 Oh I didn't miss the point I was using it as mental practice. It is also good to be able to verify your answer as it is possible to make errors in entering your data into calculators.

Because they wanted you to follow the correct method Many times we arrive at right solution with wrong method because wrong method does not follows every time thats why they want you to learn conventional method first then in higher classes all get to know about various tricks but they have exceptions and from various sources

@The Taco Kawaii 👍🏻

@@_ABHITIWARI As one of the better maths teacher I had used to say to us: "It's better to know how to solve one problem ten ways, than ten problems one way."

@@colinyoung3685 pk

@@colinyoung3685 ha thike

I don't know why I never made a video on it until now. Thanks for watching.

@@tecmath the thumbnail got my interest, as I feel I'm quite good with mental arithmetic Well, didn't know this trick and was; oh no this is too good Thank you ✅

@@tecmath I find a much easier way of doing it is reducing the number you are looking for the percentage of to 1% by dividing it by 100 then multiplying that number by the percentage you are looking for for example: 48% 0f 50 becomes 50/100=0.50 then 0.50x48=24 32% of 176 becomes 176/100=1.76 then 1.76x32=56.32 but try to do 32% of 176 the way this video says to and gooooood luck his trick works for simple numbers but other numbers that aren't not so much

Is that really you, Elon???

@@janwhite9381 yh yh

I wish teachers would acknowledge that sometimes kids need to be shown different ways to do things because some people learn different ways. Some things in math have never stuck to me because of how badly it was taught.

Love it.

I was a remedial maths TEACHER and I never knew this. I would have taught it if I had!

Plus I have a tendency to hate unnecessary algebra!

@@lesleyhawes6895 yes but it isn’t useful unless the number is something easy like 25 50 75 or 33. It doesn’t help if you want to know 29% of 217 or 18% of 88.

Me too. God the teaching was bad. I learned a lot more in the university of life.

The reason you have never seen this is because it nearly useless. It only works if the number on the right is a multiple of 25. Very few numbers are a multiple of 25. Basically the whole trick is this: % means "times 1/100 or 0.01" and 25 mean "100 quarters." It is basically useful for less than 2% of this type of math problems. It is useless for problems like "13% of 25" or "16% of 51."

You are super lucky, you. I had no one.

What they said..

@@cassf2328 but its explained much clearer

Best reply of all of them up to 4 days ago. Kudos to the math teacher explaining "why"it works

Yep, the author mentions commutation, but doesn't fully explain how it applies to the %

still too hard for me cause I'm bad at multiplying decimals

@@heliopyre Before you try to calculate, make a quick estimate, then you don’t have to keep track of the decimal place. I.e. 40% of 50 is a little less than 25.

@@0chief00 near enough is good enough for me , 10% of $10 is $1, 20% is $2 , 33% is $3.30 , 10% of $100 is $10 , 10% of $50 is $5 , 12% of $50 is around $56 , i think lol

Our teacher taught us that too. Even though she was an ogre it stuck with me. In some other ways she didn't really explain stuff and I had problems transposing a formula and only fully grasped it when it was explained in some Open University courses I did years later.

Underrated Comment

Its perhaps whats behind the ignorance that kills so many.......

Maths education in particular could do with a big review

This trick is pretty much useless. What is 16% of 24? What is 48% of 51? It only works if the number on the right is a multiple of 25. Very few numbers are a multiple of 25.

😂😂😂

Yeah and since parents or grandparents learned a different method they can't even help kids with their homework. Did you see that movie stand and deliver the board of education thought the class cheated because they got similar answers wrong but it was because they all had the same teacher and were taught the same way.

Dumber kids are easier to manipulate... and vote democrat.

What I figured out about Common Core is We are over thinking it. What Common Core does is teach the most basic ways to do Math over and over. I think they do that so that the most kids will get something from it. My problem was most of my kid's homework was writing down math functions that I automatically skipped over in my head. It was instinctual for me to start where the work of the problem started and not to start with organizing the problem to fit the teacher's desired method. It was just too simple. I still hate Common Core but now I understand why.

@@swn69 GET OVER IT LOSER . . . TRUMPY BEAR LOST

Dumbing of population is now showing great results worldwide, nobody that i thought clever has yet taken time to calculate the risk factors of the Chinese flu yet...they’d rather be told by media what to do or think...

@@lazycat7409 They were.

Even today I still believe kids should not use calculators in school until college or university. Too many young adults today can't do math without their calculator.

@@danielnormand8156 Agree, you need to know the formulas of the math why and how

Just having to do it over and over in life teaches you ways. I've done this pretty instinctively--just calculated 10%, or 1%, and multiplied. I'm usually right. I don't know why they don't teach other approaches in school because this is the one that sort of came naturally eventually.

Anyone got a personal computer that confirms jokes?

yeahhhhhh

You’re 62 of what? You’ve got to give us more to work with 🤪

@@Reilly1962 Haha....62 of infinity lol

62 ok...I've been seeing people your age a lot in the comments :)

@@bluex6095 I get that a lot.

@@jack002tuber Ok...

Thanks!

...now I can't unhear it geesh lolzz

YUP,

75% is 75/100 which reduces to 3/4. Something I learned in 2d grade, 68 years ago.

@@johngreen3543 That's when schools actually taught math and kids were nt stupid. Today the schools are to busy teaching gender equality and the kids can't figure out what a two is.

@@johnsegertsons2143 Some of us like to think that schools can teach both--arithmetic and gender equality--since both are useful information for our children to know.

@@ajs11201 , Gee Idk? Trying to figure out what bathroom to use,might not be as important as learning to make change , figure sales tax, do percentages on a income tax form. Because with that gender studies degree making change at McDonald's will come in handy !

He would have been the generation previous, referred to as "The Lost Generation".

My dad made it through 8th grade and quit for the same reason as yours. My 3rd grade teacher told me to quit asking dad for help with division. Implying the man was stupid but I knew for a fact he was the smartest man in the world, yanno? From that day forward I hated mathematics, school, and my 3rd grade teacher...hahaha

Took me a few seconds to remember that but yes, I thought the same and haven't watched the video yet.

*Shark bait oou la la*

@TheAwesome Charles1111 Thank You 👍

So now the question arises, are Asians better at math or do they just teach it better there??

Could we please bring more Asians to our country? I don’t mean just to study 📖 and go back to their countries. Please stay here! We’re in a lot of trouble. We need as much help as we can get. Ever seen a homeless Asian person? They work hard, they have great families, they don’t whine and they don’t drain resources from the country. Don’t be jealous; learn from them.

Ugh. Absolutely dread those words. If the answer is correct and they solved it in a way that would yield correct results every time, then they shouldn't be brought down for it. I can understand trying to expose kids to different ways to solve problems and trying to push them toward more efficient methods, but half the time the stuff you're teaching them is just abstract gobbledegook that won't ultimately apply to their lives. We force them to answer questions covering stem and leaf plots and strip diagrams, but when have any of us ever seen one of these things show up in our real lives?