40% of Kylie's amount was $1107 less than Sean's amount. When Kylie spent 30% of her amount and Sean spent 60% of his amount, they had the same amount of amount left. Find the amount that Sean had at first.

	Kylie	Sean
Before	20 u	35 u
Change	- 6 u	- 21 u
After	14 u	14 u

Percentage of Kylie's amount left
= 100% - 30%
= 70%

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

70% = ⁷⁰₁₀₀ = ⁷₁₀
40% = ⁴⁰₁₀₀ = ²₅

The amounts of amount that Kylie and Sean had left were the same. Make the numerators the same.

⁷₁₀ of Kylie's amount = ²₅ of Sean's amount
¹⁴₂₀ of Kylie's amount = ¹⁴₃₅ of Sean's amount

Amount that Kylie had = 20 u

40% of the amount that Kylie had
= 40% x 20 u
= ⁴⁰₁₀₀ x 20 u
= 8 u

Difference between Sean's amount and 40% of Kylie's amount
= 35 u - 8 u
= 27 u

27 u = 1107

1 u = 1107 ÷ 27 = 41

Amount that Sean had at first
= 35 u
= 35 x 41
= $1435

Answer(s): $1435