Rebecca and Grace shared $30 equally. How much money must Rebecca give to Grace so that Grace will have two times as much money as Rebecca?
| |
Rebecca |
Grace |
Total |
| Before |
15 |
15 |
30 |
| Change |
- 5 |
+ 5 |
|
| After |
1 u |
2 u |
30 |
Amount that each of them had at first
= 30 ÷ 2
= $15
Amount that Rebecca had = 1 u
Amount that Grace had = 2 u
Total amount that Rebecca and Grace
= 1 u + 2 u
= 3 u
3 u = 30
1 u = 30 ÷ 3 = 10
Amount that Rebecca must give to Grace
= 15 - 10
= $5
Answer(s): $5
