Jaslyn and Olivia collected stickers. Jaslyn gave 50% of her stickers to Olivia and as a result, Olivia's stickers increased by 30%. If Jaslyn had 12 stickers left, find the number of stickers Olivia should give to Jaslyn in the end so that both had an equal number of stickers.

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

3 u = 12

1 u = 12 ÷ 3 = 4

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

Number of stickers that Olivia should give to Jaslyn so that both had an equal number of stickers in the end
= 10 u ÷ 2
= 5 u
= 5 x 4
= 20

Answer(s): 20