80% of Lynn's amount was $800 more than Perry's amount. When Lynn spent 60% of her amount and Perry spent 10% of his amount, they had the same amount of amount left. Find the amount that Perry had at first.

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

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

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

40% = ⁴⁰₁₀₀ = ²₅
90% = ⁹⁰₁₀₀ = ⁹₁₀

The amounts of amount that Lynn and Perry had left were the same.
Make the numerators the same.

²₅ of Lynn's amount = ⁹₁₀ of Perry's amount
¹⁸₄₅ of Lynn's amount = ¹⁸₂₀ of Perry's amount

Amount that Lynn had = 45 u

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

Difference between 80% of Lynn's amount and Perry's amount
= 36 u - 20 u 
= 16 u

16 u = 800
1 u = 800 ÷ 16 = 50

Amount that Perry had at first
= 20 u
= 20 x 50
= $1000

Answer(s): $1000