Min and Kylie collected postcards. Min gave 60% of her postcards to Kylie and as a result, Kylie's postcards increased by 20%. If Min had 14 postcards left, find the number of postcards Kylie should give to Min in the end so that both had an equal number of postcards.

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

2 u = 14

1 u = 14 ÷ 2 = 7

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

Number of postcards that Kylie should give to Min so that both had an equal number of postcards in the end
= 16 u ÷ 2
= 8 u
= 8 x 7
= 56

Answer(s): 56