PSLE
Usha and Gillian made some vanilla puffs and chocolate chip puffs. Usha made 83 more vanilla puffs than chocolate chip puffs. Gillian made 179 more chocolate chip puffs than vanilla puffs. The total number of vanilla puffs made up 26% of the total number of puffs they made. How many vanilla puffs did they make altogether?

Number of chocolate chip puffs		Number of vanilla puffs
74%		26%
Usha	Gillian	Usha	Gillian
1 u	1 p + 179	1 u + 83	1 p

Usha
Number of chocolate chip puffs = 1 u
Number of vanilla puffs = 1 u + 83

Gillian
Number of vanilla puffs = 1 p
Number of chocolate chip puffs = 1 p + 179

Number of chocolate chip puffs in percent
= 100% - 26%
= 74%

1 u + 83 + 1 p = 26% --- (1)
1 u + 1 p + 179 = 74% --- (2)

(2) - (1)
74% - 26% = 179 - 83
48% = 96

1% = 96 ÷ 48 = 2

Number of vanilla puffs that they made altogether
= 26%
= 26 x 2
= 52

Answer(s): 52