3 sisters, Betty, Sarah and Gem, paid a total of $36 for a present. Betty paid
14 of what the rest paid. Sarah paid
17 of what the rest paid. How much did Gem pay?
Betty |
Gem |
Sarah |
Total |
1x8 |
4x8 |
5x8 |
7x5 |
1x5 |
8x5 |
8 u |
27 u |
5 u |
40 u |
Total cost of the present = 40 u
40 u = 36
1 u = 36 ÷ 40 = 0.90
Amount that Gem paid
= 40 u - 8 u - 5 u
= 27 u
= 27 x 0.90
= $24.30
Answer: $24.30