The ratio of Riordan's money to Fred's money is 1 : 7. If Fred has $252, how much must he give to Riordan so both will have the equal amount of money?
| |
Riordan |
Fred |
Total |
| Before |
1 u |
7 u |
8 u |
| Change |
+ 3 u |
- 3 u |
|
| After |
4 u |
4 u |
8 u |
Comparing Riordan and
Fred in the end |
1 |
1 |
|
Amount that Fred has at first = 7 u
7 u = 252
1 u = 252 ÷ 7 = 36
Total amount that Fred and Riordan have
= 1 u + 7 u
= 8 u
Amount that each of them will have in the end
= 8 u ÷ 2
= 4 u
Amount that Fred must give to Riordan
= 4 u - 1 u
= 3 u
= 3 x 36
= $108
Answer(s): $108
