Pamela and Tammy collected stamps. Pamela gave 60% of her stamps to Tammy and as a result, Tammy's stamps increased by 20%. If Pamela had 12 stamps left, find the number of stamps Tammy should give to Pamela in the end so that both had an equal number of stamps.

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

2 u = 12

1 u = 12 ÷ 2 = 6

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

Number of stamps that Tammy should give to Pamela so that both had an equal number of stamps in the end
= 16 u ÷ 2
= 8 u
= 8 x 6
= 48

Answer(s): 48