Im just a little confused on how to answer this question.

Question

A ball bounced 64% of the height from which it was dropped. The bounce was 72 cm high. What is the height from which the ball was dropped.
I think there has to be an algebraic equation of some sort, but I'm not sure how to find the right one.

Answer 1

let the original height be h cm

so 64% of h = 72
.64h = 72
h = 72/.64 = 112.5 cm

(check by taking 64% of 112.5)

Answer 2

A new queen size bed sheet measures
210 cm by 240 cm. The length and
width each shrinks by 2% after the first
wash.
a) What are the dimensions of the
sheet after washing?
b) What is the percent decrease in the
area of the sheet?

Answer 3

Your answer is correct. Thank you so much for helping with the math question.