Nick, Gabriel and Chris collected stamps in the ratio of 11 : 6 : 10. After Chris gave ³₄ to Nick and Gabriel, Chris had 336 less stamps than Nick. The number of stamps that Gabriel had increased by 80%. How many stamps did Nick and Chris have in the end?

	Nick	Gabriel	Chris
Before	11 u	6 u	10 u
Change	+ 2.7 u	+ 4.8 u	- 7.5 u
After	13.7 u	10.8 u	2.5 u

Number of stamps that Chris gave to Nick and Gabriel
= ³₄ x 10 u
= 7.5 u

Number of stamps that Gabriel received from Chris
= ⁸⁰₁₀₀ x 6 u
= 4.8 u

Number of stamps that Nick received from Chris
= 7.5 u - 4.8 u
= 2.7 u

Number of less stamps that Chris had less than Nick
= 13.7 u - 2.5 u 
= 11.2 u

11.2 u = 336

1 u = 336 ÷ 11.2 = 30

Number of stamps that Nick and Chris had
= 13.7 u + 2.5 u
= 16.2 u
= 16.2 x 30
= 486

Answer(s): 486