Japheth, Zeph and Cai collected stickers in the ratio of 12 : 7 : 6. After Cai gave ³₄ to Japheth and Zeph, Cai had 715 less stickers than Japheth. The number of stickers that Zeph had increased by 10%. How many stickers did Japheth and Cai have in the end?

	Japheth	Zeph	Cai
Before	12 u	7 u	6 u
Change	+ 3.8 u	+ 0.7 u	- 4.5 u
After	15.8 u	7.7 u	1.5 u

Number of stickers that Cai gave to Japheth and Zeph
= ³₄ x 6 u
= 4.5 u

Number of stickers that Zeph received from Cai
= ¹⁰₁₀₀ x 7 u
= 0.7 u

Number of stickers that Japheth received from Cai
= 4.5 u - 0.7 u
= 3.8 u

Number of less stickers that Cai had less than Japheth
= 15.8 u - 1.5 u 
= 14.3 u

14.3 u = 715

1 u = 715 ÷ 14.3 = 50

Number of stickers that Japheth and Cai had
= 15.8 u + 1.5 u
= 17.3 u
= 17.3 x 50
= 865

Answer(s): 865