Barbara and Sarah bought a present for their father. They shared the cost equally between them. Barbara used
57 of her savings while Sarah used
15 of her savings. What fraction of their total savings was used to buy the present?
Each girl shared half the cost of the present. The amount that each of them spent is the same.
Make the numerators the same. LCM of 5 and 1 is 5.
57 of Barbara's savings =
15 of Sarah's savings
57 of Barbara's savings =
525 of Sarah's savings
| |
Barbara |
Sarah |
Total |
| Before |
7 u |
25 u |
32 u |
| Change |
- 5 u |
- 5 u |
- 10 u |
| After |
2 u |
20 u |
22 u |
Amount of savings spent
= 5 u + 5 u
= 10 u
Total amount of savings at first
= 7 u + 25 u
= 32 u
Fraction of their total savings used
=
1032=
516 Answer(s):
516 
