Linda and Lynn collected stamps. Linda gave 60% of her stamps to Lynn and as a result, Lynn's stamps increased by 20%. If Linda had 16 stamps left, find the number of stamps Lynn should give to Linda in the end so that both had an equal number of stamps.

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

2 u = 16

1 u = 16 ÷ 2 = 8

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

Number of stamps that Lynn should give to Linda so that both had an equal number of stamps in the end
= 16 u ÷ 2
= 8 u
= 8 x 8
= 64

Answer(s): 64