Daniel, Valen and Calvin collected coins in the ratio of 7 : 8 : 10. After Calvin gave ³₄ to Daniel and Valen, Calvin had 336 less coins than Daniel. The number of coins that Valen had increased by 45%. How many coins did Daniel and Calvin have in the end?

	Daniel	Valen	Calvin
Before	7 u	8 u	10 u
Change	+ 3.9 u	+ 3.6 u	- 7.5 u
After	10.9 u	11.6 u	2.5 u

Number of coins that Calvin gave to Daniel and Valen
= ³₄ x 10 u
= 7.5 u

Number of coins that Valen received from Calvin
= ⁴⁵₁₀₀ x 8 u
= 3.6 u

Number of coins that Daniel received from Calvin
= 7.5 u - 3.6 u
= 3.9 u

Number of less coins that Calvin had less than Daniel
= 10.9 u - 2.5 u 
= 8.4 u

8.4 u = 336

1 u = 336 ÷ 8.4 = 40

Number of coins that Daniel and Calvin had
= 10.9 u + 2.5 u
= 13.4 u
= 13.4 x 40
= 536

Answer(s): 536