Ethan, Bobby and Cyrus collected stickers in the ratio of 9 : 4 : 8. After Cyrus gave ³₁₀ to Ethan and Bobby, Cyrus had 230 less stickers than Ethan. The number of stickers that Bobby had increased by 30%. How many stickers did Ethan and Cyrus have in the end?

	Ethan	Bobby	Cyrus
Before	9 u	4 u	8 u
Change	+ 1.2 u	+ 1.2 u	- 2.4 u
After	10.2 u	5.2 u	5.6 u

Number of stickers that Cyrus gave to Ethan and Bobby
= ³₁₀ x 8 u
= 2.4 u

Number of stickers that Bobby received from Cyrus
= ³⁰₁₀₀ x 4 u
= 1.2 u

Number of stickers that Ethan received from Cyrus
= 2.4 u - 1.2 u
= 1.2 u

Number of less stickers that Cyrus had less than Ethan
= 10.2 u - 5.6 u 
= 4.6 u

4.6 u = 230

1 u = 230 ÷ 4.6 = 50

Number of stickers that Ethan and Cyrus had
= 10.2 u + 5.6 u
= 15.8 u
= 15.8 x 50
= 790

Answer(s): 790