The ratio of Warren's money to Justin's money is 11 : 15. If Justin has $645, how much must he give to Warren so both will have the equal amount of money?
| |
Warren |
Justin |
Total |
| Before |
11 u |
15 u |
26 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
13 u |
13 u |
26 u |
Comparing Warren and
Justin in the end |
1 |
1 |
|
Amount that Justin has at first = 15 u
15 u = 645
1 u = 645 ÷ 15 = 43
Total amount that Justin and Warren have
= 11 u + 15 u
= 26 u
Amount that each of them will have in the end
= 26 u ÷ 2
= 13 u
Amount that Justin must give to Warren
= 13 u - 11 u
= 2 u
= 2 x 43
= $86
Answer(s): $86
