The ratio of Peter's money to Valen's money is 1 : 7. If Valen has $140, how much must he give to Peter so both will have the equal amount of money?
| |
Peter |
Valen |
Total |
| Before |
1 u |
7 u |
8 u |
| Change |
+ 3 u |
- 3 u |
|
| After |
4 u |
4 u |
8 u |
Comparing Peter and
Valen in the end |
1 |
1 |
|
Amount that Valen has at first = 7 u
7 u = 140
1 u = 140 ÷ 7 = 20
Total amount that Valen and Peter have
= 1 u + 7 u
= 8 u
Amount that each of them will have in the end
= 8 u ÷ 2
= 4 u
Amount that Valen must give to Peter
= 4 u - 1 u
= 3 u
= 3 x 20
= $60
Answer(s): $60
