Perry's and Wendy's monthly allowances were the same at first. Perry's allowance increased by 20% while Wendy's decreased by 35%. Given that Perry's allowance would decrease by another 40% if he had received $1248 less from his fathers, find the difference in the children's monthly allowances.

	Perry	Wendy
Before	1 u	1 u
Change 1	+ 0.2 u	- 0.35 u
After 1	1.2 u	0.65 u
Change 2	- 0.48 u	No change
After 2	0.72 u	0.65 u

Increase in Perry's allowance
= 20% x 1 u
= ²⁰₁₀₀ x 1 u
= 0.2 u

Decrease in Wendy's allowance
= 35% x 1 u
= ³⁵₁₀₀ x 1 u
= 0.35 u

Decrease in Perry's allowance if he had received $1248 less from his fathers
= 40% x 1.2 u
= ⁴⁰₁₀₀ x 1.2 u
= 0.48 u

0.48 u = 1248

1 u = 1248 ÷ 0.48 = 2600

Difference in the allowance between Perry and Wendy
= 1.2 u - 0.65 u
= 0.55 u
= 0.55 x 2600
= $1430

Answer(s): $1430