PSLE
Gabby and Cathy made some cheese croissants and banana croissants. Gabby made 33 more cheese croissants than banana croissants. Cathy made 99 more banana croissants than cheese croissants. The total number of cheese croissants made up 39% of the total number of croissants they made. How many cheese croissants did they make altogether?

Number of banana croissants		Number of cheese croissants
61%		39%
Gabby	Cathy	Gabby	Cathy
1 u	1 p + 99	1 u + 33	1 p

Gabby
Number of banana croissants = 1 u
Number of cheese croissants = 1 u + 33

Cathy
Number of cheese croissants = 1 p
Number of banana croissants = 1 p + 99

Number of banana croissants in percent
= 100% - 39%
= 61%

1 u + 33 + 1 p = 39% --- (1)
1 u + 1 p + 99 = 61% --- (2)

(2) - (1)
61% - 39% = 99 - 33
22% = 66

1% = 66 ÷ 22 = 3

Number of cheese croissants that they made altogether
= 39%
= 39 x 3
= 117

Answer(s): 117