80% of Julie's amount was $272 more than Jenson's amount. When Julie spent 60% of her amount and Jenson spent 10% of his amount, they had the same amount of amount left. Find the amount that Jenson had at first.

	80% of Julie's amount	Julie's amount	Jenson's amount
Before	36 u	45 u	20 u
Change		- 27 u (- 60%)	- 2 u (- 10%)
After		18 u	18 u

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

Percentage of Jenson's amount left
= 100% - 10%
= 90%

40% = ⁴⁰₁₀₀ = ²₅
90% = ⁹⁰₁₀₀ = ⁹₁₀

The amounts of amount that Julie and Jenson had left were the same.
Make the numerators the same.

²₅ of Julie's amount = ⁹₁₀ of Jenson's amount
¹⁸₄₅ of Julie's amount = ¹⁸₂₀ of Jenson's amount

Amount that Julie had = 45 u

80% of the amount that Julie had
= 45 u x 80%
= 45 u x ⁸⁰₁₀₀
= 36 u

Difference between 80% of Julie's amount and Jenson's amount
= 36 u - 20 u 
= 16 u

16 u = 272
1 u = 272 ÷ 16 = 17

Amount that Jenson had at first
= 20 u
= 20 x 17
= $340

Answer(s): $340