Ken's and Sabrina's monthly allowances were the same at first. Ken's allowance increased by 40% while Sabrina's decreased by 35%. Given that Ken's allowance would decrease by another 25% if he had received $567 less from his parents, find the difference in the children's monthly allowances.

	Ken	Sabrina
Before	1 u	1 u
Change 1	+ 0.4 u	- 0.35 u
After 1	1.4 u	0.65 u
Change 2	- 0.35 u	No change
After 2	1.05 u	0.65 u

Increase in Ken's allowance
= 40% x 1 u
= ⁴⁰₁₀₀ x 1 u
= 0.4 u

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

Decrease in Ken's allowance if he had received $567 less from his parents
= 25% x 1.4 u
= ²⁵₁₀₀ x 1.4 u
= 0.35 u

0.35 u = 567

1 u = 567 ÷ 0.35 = 1620

Difference in the allowance between Ken and Sabrina
= 1.4 u - 0.65 u
= 0.75 u
= 0.75 x 1620
= $1215

Answer(s): $1215