PSLE
Elyse and Nora made some vanilla buns and apricot buns. Elyse made 37 more vanilla buns than apricot buns. Nora made 153 more apricot buns than vanilla buns. The total number of vanilla buns made up 21% of the total number of buns they made. How many apricot buns did they make altogether?

Number of apricot buns		Number of vanilla buns
79%		21%
Elyse	Nora	Elyse	Nora
1 u	1 p + 153	1 u + 37	1 p

Elyse
Number of apricot buns = 1 u
Number of vanilla buns = 1 u + 37

Nora
Number of vanilla buns = 1 p
Number of apricot buns = 1 p + 153

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

1 u + 37 + 1 p = 21% --- (1)
1 u + 1 p + 153 = 79% --- (2)

(2) - (1)
79% - 21% = 153 - 37
58% = 116

1% = 116 ÷ 58 = 2

Number of apricot buns that they made altogether
= 79%
= 79 x 2
= 158

Answer(s): 158