Perry, Fabian and Corwin collected erasers in the ratio of 7 : 10 : 10. After Corwin gave ³₅ to Perry and Fabian, Corwin had 55 less erasers than Perry. The number of erasers that Fabian had increased by 35%. How many erasers did Perry and Corwin have in the end?

	Perry	Fabian	Corwin
Before	7 u	10 u	10 u
Change	+ 2.5 u	+ 3.5 u	- 6 u
After	9.5 u	13.5 u	4 u

Number of erasers that Corwin gave to Perry and Fabian
= ³₅ x 10 u
= 6 u

Number of erasers that Fabian received from Corwin
= ³⁵₁₀₀ x 10 u
= 3.5 u

Number of erasers that Perry received from Corwin
= 6 u - 3.5 u
= 2.5 u

Number of less erasers that Corwin had less than Perry
= 9.5 u - 4 u 
= 5.5 u

5.5 u = 55

1 u = 55 ÷ 5.5 = 10

Number of erasers that Perry and Corwin had
= 9.5 u + 4 u
= 13.5 u
= 13.5 x 10
= 135

Answer(s): 135