Kylie and Emily collected stickers. Kylie gave 60% of her stickers to Emily and as a result, Emily's stickers increased by 20%. If Kylie had 10 stickers left, find the number of stickers Emily should give to Kylie in the end so that both had an equal number of stickers.

	Kylie	Emily	Comparing the change in Emily's stickers
Before	5x1 = 5 u		5x3 = 15u
Change	- 3x1 = - 3 u	+ 3x1 = + 3 u	+ 1x3 = + 3 u
After	2x1 = 2 u		6x3 = 18 u

60% = ⁶⁰₁₀₀ = ³₅
20% = ²⁰₁₀₀ = ¹₅

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

2 u = 10

1 u = 10 ÷ 2 = 5

Number of stickers that Emily had more than Kylie in the end
= 18 u - 2 u
= 16 u

Number of stickers that Emily should give to Kylie so that both had an equal number of stickers in the end
= 16 u ÷ 2
= 8 u
= 8 x 5
= 40

Answer(s): 40