Raeann and Eva collected stickers. Raeann gave 50% of her stickers to Eva and as a result, Eva's stickers increased by 30%. If Raeann had 18 stickers left, find the number of stickers Eva should give to Raeann in the end so that both had an equal number of stickers.

	Raeann	Eva	Comparing the change in Eva's stickers
Before	2x3 = 6 u		10x1 = 10u
Change	- 1x3 = - 3 u	+ 1x3 = + 3 u	+ 3x1 = + 3 u
After	1x3 = 3 u		13x1 = 13 u

50% = ⁵⁰₁₀₀ = ¹₂
30% = ³⁰₁₀₀ = ³₁₀

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

3 u = 18

1 u = 18 ÷ 3 = 6

Number of stickers that Eva had more than Raeann in the end
= 13 u - 3 u
= 10 u

Number of stickers that Eva should give to Raeann so that both had an equal number of stickers in the end
= 10 u ÷ 2
= 5 u
= 5 x 6
= 30

Answer(s): 30