Natalie and Kylie collected stamps. Natalie gave 60% of her stamps to Kylie and as a result, Kylie's stamps increased by 20%. If Natalie had 22 stamps left, find the number of stamps Kylie should give to Natalie in the end so that both had an equal number of stamps.

	Natalie	Kylie	Comparing the change in Kylie's stamps
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 stamps that Kylie had is repeated.  Make the increase in the number of stamps that Kylie had the same. LCM of 3 and 1 = 3

2 u = 22

1 u = 22 ÷ 2 = 11

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

Number of stamps that Kylie should give to Natalie so that both had an equal number of stamps in the end
= 16 u ÷ 2
= 8 u
= 8 x 11
= 88

Answer(s): 88