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# Need help with percent equations?

Need to know how to write 15% of what number is 24 in a percent equation NOT PROPORTION

### 4 Answers

- WaheedLv 61 decade agoFavorite Answer
Let X is the answer then

( X ) x 0.15 = 24

X = (24) /0.15 = 160 ans

- 5 years ago
Ok, since you're solving equations, I'll set up a proportion. 5% is equal to 5/100. (Always change the percent to a fraction). This is equal to some number x over 80, because we know that 5% of 80 is smaller than 80, so x is in the numerator. So what you have is: 5/100=x/80. (When you do percents x is always on top of the number you're finding the percent of). Now, solve by cross multiplying - muliply the 5 and the 80 together because they are diagonals, and 100 and x because they are diagonals (go across, or diagonal in cross multiplying). This will give you a new equation of 400=100x. All that is left to do is to divide both sides by 100 to get x isolated, and your answer is x=4. Hope this helps! Again: Set up proportion: 5/100=x/80 Cross multiply: 5(80)=100(x) Simplify: 400=100x Divide by 100: x=4

- HeidiLv 71 decade ago
Translate your English to Math.

percent - out of 100

of - multiply

what number - x

is - equals

15/100 * x = 24

or

0.15 * x = 24