Anna and Nicole collected stickers. Anna gave 30% of her stickers to Nicole and as a result, Nicole's stickers increased by 25%. If Anna had 42 stickers left, find the number of stickers Nicole should give to Anna in the end so that both had an equal number of stickers.

	Anna	Nicole	Comparing the change in Nicole's stickers
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 stickers that Nicole had is repeated.  Make the increase in the number of stickers that Nicole had the same. LCM of 3 and 1 = 3

7 u = 42

1 u = 42 ÷ 7 = 6

Number of stickers that Nicole had more than Anna in the end
= 15 u - 7 u
= 8 u

Number of stickers that Nicole should give to Anna so that both had an equal number of stickers in the end
= 8 u ÷ 2
= 4 u
= 4 x 6
= 24

Answer(s): 24