The ratio of Harry's money to Seth's money is 7 : 15. If Seth has $645, how much must he give to Harry so both will have the equal amount of money?
| |
Harry |
Seth |
Total |
| Before |
7 u |
15 u |
22 u |
| Change |
+ 4 u |
- 4 u |
|
| After |
11 u |
11 u |
22 u |
Comparing Harry and
Seth in the end |
1 |
1 |
|
Amount that Seth has at first = 15 u
15 u = 645
1 u = 645 ÷ 15 = 43
Total amount that Seth and Harry have
= 7 u + 15 u
= 22 u
Amount that each of them will have in the end
= 22 u ÷ 2
= 11 u
Amount that Seth must give to Harry
= 11 u - 7 u
= 4 u
= 4 x 43
= $172
Answer(s): $172
