The ratio of Pierre's money to Luis's money is 3 : 7. If Luis has $133, how much must he give to Pierre so both will have the equal amount of money?
| |
Pierre |
Luis |
Total |
| Before |
3 u |
7 u |
10 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
5 u |
5 u |
10 u |
Comparing Pierre and
Luis in the end |
1 |
1 |
|
Amount that Luis has at first = 7 u
7 u = 133
1 u = 133 ÷ 7 = 19
Total amount that Luis and Pierre have
= 3 u + 7 u
= 10 u
Amount that each of them will have in the end
= 10 u ÷ 2
= 5 u
Amount that Luis must give to Pierre
= 5 u - 3 u
= 2 u
= 2 x 19
= $38
Answer(s): $38
