Abi and Gillian collected stickers. Abi gave 50% of her stickers to Gillian and as a result, Gillian's stickers increased by 30%. If Abi had 33 stickers left, find the number of stickers Gillian should give to Abi in the end so that both had an equal number of stickers.

	Abi	Gillian	Comparing the change in Gillian's stickers
Before	2x3 = 6 u		10x1 = 10u
Change	- 1x3 = - 3 u	+ 1x3 = + 3 u	+ 3x1 = + 3 u
After	1x3 = 3 u		13x1 = 13 u

50% = ⁵⁰₁₀₀ = ¹₂
30% = ³⁰₁₀₀ = ³₁₀

The increase in the number of stickers that Gillian had is repeated.  Make the increase in the number of stickers that Gillian had the same. LCM of 1 and 3 = 3

3 u = 33

1 u = 33 ÷ 3 = 11

Number of stickers that Gillian had more than Abi in the end
= 13 u - 3 u
= 10 u

Number of stickers that Gillian should give to Abi so that both had an equal number of stickers in the end
= 10 u ÷ 2
= 5 u
= 5 x 11
= 55

Answer(s): 55