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

	Yoko	Diana	Comparing the change in Diana's stamps
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 stamps that Diana had is repeated.  Make the increase in the number of stamps that Diana had the same. LCM of 3 and 1 = 3

7 u = 56

1 u = 56 ÷ 7 = 8

Number of stamps that Diana had more than Yoko in the end
= 15 u - 7 u
= 8 u

Number of stamps that Diana should give to Yoko so that both had an equal number of stamps in the end
= 8 u ÷ 2
= 4 u
= 4 x 8
= 32

Answer(s): 32