The ratio of the number of puffs in Container F to the number of puffs in Container G was 7 : 5. 40% of the puffs in Container F and 0.8 of those in Container G were vanilla. After transferring the puffs between the 2 boxes, the number of chocolate puffs in both boxes are the same. Likewise, the number of vanilla puffs in both boxes are the same. If a total of 264 puffs were moved, how many more puffs were there in Container F than Container G at first?

Container F		Container G
7 u		5 u
Vanilla	Chocolate	Vanilla	Chocolate
2.8 u	4.2 u	4 u	1 u
+ 0.6 u	- 1.6 u	- 0.6 u	+ 1.6 u
3.4 u	2.6 u	3.4 u	2.6 u

Number of vanilla puffs in Container F
= 40% x 7 u
= ⁴⁰₁₀₀ x 7 u
= 2.8 u

Number of chocolate puffs in Container F
= 7 u - 2.8 u
= 4.2 u

Number of vanilla puffs in Container G
= 0.8 x 5 u
= 4 u

Number of chocolate puffs in Container G
= 5 u - 4 u
= 1 u

Number of vanilla puffs in each box in the end
= (2.8 u + 4 u) ÷ 2
= 6.8 u ÷ 2
= 3.4 u

Number of chocolate puffs in each box in the end
= (4.2 u + 1 u) ÷ 2
= 5.2 u ÷ 2
= 2.6 u

Number of puffs moved
= 0.6 u + 1.6 u
= 2.2 u

2.2 u = 264

1 u = 264 ÷ 2.2 = 120

Number of more puffs in Container F than Container G at first
= 7 u - 5 u
= 2 u
= 2 x 120
= 240

Answer(s): 240