PSLE
Irene and Ivory made some cranberry puffs and blueberry puffs. Irene made 67 more cranberry puffs than blueberry puffs. Ivory made 131 more blueberry puffs than cranberry puffs. The total number of cranberry puffs made up 42% of the total number of puffs they made. How many cranberry puffs did they make altogether?

Number of blueberry puffs		Number of cranberry puffs
58%		42%
Irene	Ivory	Irene	Ivory
1 u	1 p + 131	1 u + 67	1 p

Irene
Number of blueberry puffs = 1 u
Number of cranberry puffs = 1 u + 67

Ivory
Number of cranberry puffs = 1 p
Number of blueberry puffs = 1 p + 131

Number of blueberry puffs in percent
= 100% - 42%
= 58%

1 u + 67 + 1 p = 42% --- (1)
1 u + 1 p + 131 = 58% --- (2)

(2) - (1)
58% - 42% = 131 - 67
16% = 64

1% = 64 ÷ 16 = 4

Number of cranberry puffs that they made altogether
= 42%
= 42 x 4
= 168

Answer(s): 168