PSLE
Roshel and Risa made some cheese muffins and chocolate chip muffins. Roshel made 15 more cheese muffins than chocolate chip muffins. Risa made 183 more chocolate chip muffins than cheese muffins. The total number of cheese muffins made up 38% of the total number of muffins they made. How many chocolate chip muffins did they make altogether?

Number of chocolate chip muffins		Number of cheese muffins
62%		38%
Roshel	Risa	Roshel	Risa
1 u	1 p + 183	1 u + 15	1 p

Roshel
Number of chocolate chip muffins = 1 u
Number of cheese muffins = 1 u + 15

Risa
Number of cheese muffins = 1 p
Number of chocolate chip muffins = 1 p + 183

Number of chocolate chip muffins in percent
= 100% - 38%
= 62%

1 u + 15 + 1 p = 38% --- (1)
1 u + 1 p + 183 = 62% --- (2)

(2) - (1)
62% - 38% = 183 - 15
24% = 168

1% = 168 ÷ 24 = 7

Number of chocolate chip muffins that they made altogether
= 62%
= 62 x 7
= 434

Answer(s): 434