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

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

2 u = 14

1 u = 14 ÷ 2 = 7

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

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

Answer(s): 56