Sabrina and Gabby collected coins. Sabrina gave 30% of her coins to Gabby and as a result, Gabby's coins increased by 25%. If Sabrina had 56 coins left, find the number of coins Gabby should give to Sabrina in the end so that both had an equal number of coins.

	Sabrina	Gabby	Comparing the change in Gabby's coins
Before	10x1 = 10 u		4x3 = 12u
Change	- 3x1 = - 3 u	+ 3x1 = + 3 u	+ 1x3 = + 3 u
After	7x1 = 7 u		5x3 = 15 u

30% = ³⁰₁₀₀ = ³₁₀
25% = ²⁵₁₀₀ = ¹₄

The increase in the number of coins that Gabby had is repeated.  Make the increase in the number of coins that Gabby had the same. LCM of 3 and 1 = 3

7 u = 56

1 u = 56 ÷ 7 = 8

Number of coins that Gabby had more than Sabrina in the end
= 15 u - 7 u
= 8 u

Number of coins that Gabby should give to Sabrina so that both had an equal number of coins in the end
= 8 u ÷ 2
= 4 u
= 4 x 8
= 32

Answer(s): 32