50% of Mary's amount was $528 less than Henry's amount. When Mary spent 25% of her amount and Henry spent 60% of his amount, they had the same amount of amount left. Find the amount that Henry had at first.

	Mary	Henry
Before	8 u	15 u
Change	- 2 u	- 9 u
After	6 u	6 u

Percentage of Mary's amount left
= 100% - 25%
= 75%

Percentage of Henry's amount left
= 100% - 60%
= 40%

75% = ⁷⁵₁₀₀ = ³₄
40% = ⁴⁰₁₀₀ = ²₅

The amounts of amount that Mary and Henry had left were the same. Make the numerators the same.

³₄ of Mary's amount = ²₅ of Henry's amount
⁶₈ of Mary's amount = ⁶₁₅ of Henry's amount

Amount that Mary had = 8 u

50% of the amount that Mary had
= 50% x 8 u
= ⁵⁰₁₀₀ x 8 u
= 4 u

Difference between Henry's amount and 50% of Mary's amount
= 15 u - 4 u
= 11 u

11 u = 528

1 u = 528 ÷ 11 = 48

Amount that Henry had at first
= 15 u
= 15 x 48
= $720

Answer(s): $720