The ratio of David's money to Howard's money is 7 : 15. If Howard has $60, how much must he give to David so both will have the equal amount of money?
| |
David |
Howard |
Total |
| Before |
7 u |
15 u |
22 u |
| Change |
+ 4 u |
- 4 u |
|
| After |
11 u |
11 u |
22 u |
Comparing David and
Howard in the end |
1 |
1 |
|
Amount that Howard has at first = 15 u
15 u = 60
1 u = 60 ÷ 15 = 4
Total amount that Howard and David have
= 7 u + 15 u
= 22 u
Amount that each of them will have in the end
= 22 u ÷ 2
= 11 u
Amount that Howard must give to David
= 11 u - 7 u
= 4 u
= 4 x 4
= $16
Answer(s): $16
