Question

Sam saved 4/7 of his paycheck and spent 2/5 of the remaining money. He was then left with $9. What was the original value of Sam's paycheck?

Answer 1

5/2

Answer 2

the amount left was

(1 - 4/7)(1 - 2/5) = 3/7 * 3/5 = 9/35 of the original amount.

So, 9/35 x = 9
x = 35