An easy way to figure out % is moving the decimal. For example say its 24.50 and you want to know 10% of that. Move the decimal to the left once and 10% of 24.50 is 2.45. Then if you want to know 20% you do the same thing but x2. So if 10% of 24.50 is 2.45 then you add another 2.45 to get 20% which would be 4.90. I myself am horrible with math but %'s for some reason comes easy to me. Now when it comes to fractions I will legit have a panic attack. Cant figure out fractions for the life of me.