The ratio of Andy's money to Henry's money is 3 : 7. If Henry has $140, how much must he give to Andy so both will have the equal amount of money?
| |
Andy |
Henry |
Total |
| Before |
3 u |
7 u |
10 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
5 u |
5 u |
10 u |
Comparing Andy and
Henry in the end |
1 |
1 |
|
Amount that Henry has at first = 7 u
7 u = 140
1 u = 140 ÷ 7 = 20
Total amount that Henry and Andy have
= 3 u + 7 u
= 10 u
Amount that each of them will have in the end
= 10 u ÷ 2
= 5 u
Amount that Henry must give to Andy
= 5 u - 3 u
= 2 u
= 2 x 20
= $40
Answer(s): $40
