Kylie, Tina and Charlie baked some croissants. Kylie and Tina baked ⁴₇ of the croissants. Tina and Charlie baked ³₅ of the croissants. Kylie and Charlie baked 377 croissants altogether.

1. What fraction of the croissants did Kylie and Charlie bake altogether?
2. How many croissants did the three girls bake in total?

Kylie	Tina	Charlie	Total
4x5		3x5	7x5
2x7	3x7		5x7
14 u	6 u	15 u	35 u

(a)
The total number of croissants remains unchanged. Make the total number of croissants the same. LCM of 7 and 5 is 35.

Number of croissants baked by Tina
= 21 u - 15 u
= 6 u

Number of tarts baked by Kylie and Charlie
= 14 u + 15 u
= 29 u

Total number of croissants = 35 u

Fraction of the croissants baked by Kylie and Charlie = ²⁹₃₅

(b)
Total number of croissants baked by Kylie and Charlie = 29 u

29 u = 377

1 u = 377 ÷ 29 = 13

Total number of croissants baked
= 35 u
= 35 x 13
= 455

Answer(s): (a) ²⁹₃₅; (b) 455