Penelope and Pamela collected stamps. Penelope gave 60% of her stamps to Pamela and as a result, Pamela's stamps increased by 20%. If Penelope had 8 stamps left, find the number of stamps Pamela should give to Penelope in the end so that both had an equal number of stamps.

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

2 u = 8

1 u = 8 ÷ 2 = 4

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

Number of stamps that Pamela should give to Penelope so that both had an equal number of stamps in the end
= 16 u ÷ 2
= 8 u
= 8 x 4
= 32

Answer(s): 32