PSLE
Barbara and Tiffany made some vanilla muffins and apricot muffins. Barbara made 69 more vanilla muffins than apricot muffins. Tiffany made 185 more apricot muffins than vanilla muffins. The total number of vanilla muffins made up 21% of the total number of muffins they made. How many vanilla muffins did they make altogether?

Number of apricot muffins		Number of vanilla muffins
79%		21%
Barbara	Tiffany	Barbara	Tiffany
1 u	1 p + 185	1 u + 69	1 p

Barbara
Number of apricot muffins = 1 u
Number of vanilla muffins = 1 u + 69

Tiffany
Number of vanilla muffins = 1 p
Number of apricot muffins = 1 p + 185

Number of apricot muffins in percent
= 100% - 21%
= 79%

1 u + 69 + 1 p = 21% --- (1)
1 u + 1 p + 185 = 79% --- (2)

(2) - (1)
79% - 21% = 185 - 69
58% = 116

1% = 116 ÷ 58 = 2

Number of vanilla muffins that they made altogether
= 21%
= 21 x 2
= 42

Answer(s): 42