Rachel and Jaslyn collected buttons. Rachel gave 25% of her buttons to Jaslyn and as a result, Jaslyn's buttons increased by 30%. If Rachel had 63 buttons left, find the number of buttons Jaslyn should give to Rachel in the end so that both had an equal number of buttons.

	Rachel	Jaslyn	Comparing the change in Jaslyn's buttons
Before	4x3 = 12 u		10x1 = 10u
Change	- 1x3 = - 3 u	+ 1x3 = + 3 u	+ 3x1 = + 3 u
After	3x3 = 9 u		13x1 = 13 u

25% = ²⁵₁₀₀ = ¹₄
30% = ³⁰₁₀₀ = ³₁₀

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

9 u = 63

1 u = 63 ÷ 9 = 7

Number of buttons that Jaslyn had more than Rachel in the end
= 13 u - 9 u
= 4 u

Number of buttons that Jaslyn should give to Rachel so that both had an equal number of buttons in the end
= 4 u ÷ 2
= 2 u
= 2 x 7
= 14

Answer(s): 14