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

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

7 u = 63

1 u = 63 ÷ 7 = 9

Number of buttons that Jaslyn had more than Lynn in the end
= 15 u - 7 u
= 8 u

Number of buttons that Jaslyn should give to Lynn so that both had an equal number of buttons in the end
= 8 u ÷ 2
= 4 u
= 4 x 9
= 36

Answer(s): 36