Xavier, Tom and Curry collected stickers in the ratio of 7 : 4 : 10. After Curry gave ⁴₅ to Xavier and Tom, Curry had 488 less stickers than Xavier. The number of stickers that Tom had increased by 20%. How many stickers did Xavier and Curry have in the end?

	Xavier	Tom	Curry
Before	7 u	4 u	10 u
Change	+ 7.2 u	+ 0.8 u	- 8 u
After	14.2 u	4.8 u	2 u

Number of stickers that Curry gave to Xavier and Tom
= ⁴₅ x 10 u
= 8 u

Number of stickers that Tom received from Curry
= ²⁰₁₀₀ x 4 u
= 0.8 u

Number of stickers that Xavier received from Curry
= 8 u - 0.8 u
= 7.2 u

Number of less stickers that Curry had less than Xavier
= 14.2 u - 2 u 
= 12.2 u

12.2 u = 488

1 u = 488 ÷ 12.2 = 40

Number of stickers that Xavier and Curry had
= 14.2 u + 2 u
= 16.2 u
= 16.2 x 40
= 648

Answer(s): 648