GCSE Maths - Reverse Percentages - Calculating The Cost Before The Discount #96 

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Other tricks of math backward. Math backwards also is 125% of 16 is 20. But 80% of 20 is 16. Another trick of math backward is divide labor hours by inflation to adjust for inflation. I mean. Math done forward can be done backward. Say you wanted to know how much inflation would happen if the auto workers wanted a 25% raise. Say they had a 5% raise while automobiles have gone up 30%. 0/4 = passive income investors + 8/4 = active income workers = 2 = 8/8 = total GDP The active income fraction equals two. these two mean they have to work twice as longer at work to make up the investors not working. This is represented by the zero. 8/8 represents a whole pie. And 8/4 represents the workers' slice of the pie. And 0/4 represents the passive income investors' slice of the pie. Well, first, let's look at at 5% raises that caused 5%inflation backward. Let's apply the 5% raise. 4 × 1.05 = 4.2. 0/4 = passive income investors + 8.2/4.2 = workers = 1.95 = 8.2/8.2 = total GDP Notice tge GDP went up with inflation. 8.2 / 8 = 1.025. 2.5% inflation happened. As you can see, the workers' hours went up to 8.2 from 8. This doesn't mean the workers have to work more hours at work. This is adjusted for inflation. So now the workers only have to work 1.95 times as many hours at work, down from 2. Now, let's add the 25% economic iniquity. The automobiles have gotten 25% more expensive. 4.2 × 80% = 3.36 Notice I did the 125% backwards and applied 80%. 0/4.84. Passive income investors + 8.2/3.36. Workers = 2.44 = 8.2/8.2 Notice that the workers now have to work 2.44 times as many hours at work. From 1.95 1.95×125%= 2.44 Now the workers want a raise of 25% because automobiles have gotten 25% more expensive. So, let's find out how much inflation happens. Any guesses? The workers raise of 25% 3.36 × 1.25 = 4.2 0/4.84. The investors + 9.04/4.2. The workers = 2.15 = 9.04/9.04 So 9.04 divided by 8.2 equals 1.10. So. This 25% raise only caused 10% inflation. But the workers didn't go back to only working times 2 as many hours at work. Hold on now. Peter was after 44% rsise to go back to normal. 3.36 × 144% = 4.8384 0/4.84. Passive income + 9.67/4.83. The workers = 2 = 9.67/9.67 GDP That's better. The workers' slice of the pie is back to 2. And 9.67/8 is 20% inflation. And for extra credit. How did I come up with the 44% raise to know the fraction would equal 2.

Same here, this channel gonna fly off the charts by the end of 2023

@@doubleb947 well they haven't posted in 1 month so sad

THEYvHAVENT posted in ( MONTHS

@@doubleb947 Its the end of 2023, i would say this channel has flown off the charts

@@XxH1s3n08 we've come a long way huh, xd glad to be in this journey

thankyou you explained it very well

This was exactly what I was looking for, Ty ❤

IKR -A fellow potato

he does tho

For bro fr❤❤❤

👌

Great to hear you found it easy to watch and digest! 😊

Thanks Benjamin, glad the video helped 👍

SAME!

🎉🎉🎉 thanks!

try it in a calculator! it does work! it still equals 180,000 , your welcome!

Ty❤

Ur mad start miss

@@ItzM3LTEDofc!!

@@aaaaaaaaaaaaaaz aw tyy!!

Also helped me too. Amazing video.

Thanks Linda, glad to hear you like it 👍

And the third by me

Yep 👍

@@deemedepic7721 uhh I was the third like…..

@@SenyorCaramelo That heart from Cognito probably belonged to you then, sorry!

I'm one of the 572 people who liked it so I guess that's good?

Glad we could help Manish! 😊

Thankyou!

Depends on your teacher.

it could be on the calculator or the non calculator exam for gcse :)

@@ellie-di7cv both papers allow calculator in gcse

How did it go?

Sorry is 36.9

Glad we could help you out 👍

no

You’re welcome, glad we could help 😊