The ratio of Cole's money to Billy's money is 5 : 13. If Billy has $156, how much must he give to Cole so both will have the equal amount of money?
| |
Cole |
Billy |
Total |
| Before |
5 u |
13 u |
18 u |
| Change |
+ 4 u |
- 4 u |
|
| After |
9 u |
9 u |
18 u |
Comparing Cole and
Billy in the end |
1 |
1 |
|
Amount that Billy has at first = 13 u
13 u = 156
1 u = 156 ÷ 13 = 12
Total amount that Billy and Cole have
= 5 u + 13 u
= 18 u
Amount that each of them will have in the end
= 18 u ÷ 2
= 9 u
Amount that Billy must give to Cole
= 9 u - 5 u
= 4 u
= 4 x 12
= $48
Answer(s): $48
