Xylia, Marion and Betty bought a present for their neighbour. They shared the cost equally between them. Xylia used ²₅ of her savings, Marion used ³₅ of her savings and Betty used ⁵₆ of her savings. Xylia and Betty had $357 left. How much did each girl pay for the present?
The amount spent by each girl is the same.  Make the numerators the same.
LCM of 2, 3 and 5 = 30

2x155x15 of Xylia's savings = 3x105x10 of Marion's savings = 5x66x6 of Betty savings
3075 of Xylia's savings = 3050 of Marion's savings = 3036 of Betty's savings

	Xylia	Marion	Betty
Before	75 u	50 u	36 u
Change	- 30 u	- 30 u	- 30 u
After	45 u	20 u	6 u

Savings that Xylia had left
= 75 u - 30 u
= 45 u

Savings that Betty had left
= 36 u - 30 u
= 6 u

Total savings that Xylia and Betty had left
= 45 u + 6 u
= 51 u

51 u = 357

1 u = 357 ÷ 51 = 7

Amount that each girl paid
= 30 u
= 30 x 7
= $210

Answer(s): $210