Lynn, Mary and Marion bought a souvenir for their uncle. They shared the cost equally between them. Lynn used ⁴₇ of her savings, Mary used ⁵₆ of her savings and Marion used ³₇ of her savings. Lynn and Marion had $375 left. How much did each girl pay for the souvenir?
The amount spent by each girl is the same.  Make the numerators the same.
LCM of 4, 5 and 3 = 60

4x157x15 of Lynn's savings = 5x126x12 of Mary's savings = 3x207x20 of Marion savings
60105 of Lynn's savings = 6072 of Mary's savings = 60140 of Marion's savings

	Lynn	Mary	Marion
Before	105 u	72 u	140 u
Change	- 60 u	- 60 u	- 60 u
After	45 u	12 u	80 u

Savings that Lynn had left
= 105 u - 60 u
= 45 u

Savings that Marion had left
= 140 u - 60 u
= 80 u

Total savings that Lynn and Marion had left
= 45 u + 80 u
= 125 u

125 u = 375

1 u = 375 ÷ 125 = 3

Amount that each girl paid
= 60 u
= 60 x 3
= $180

Answer(s): $180