The ratio of Ahmad's money to Ian's money is 3 : 13. If Ian has $520, how much must he give to Ahmad so both will have the equal amount of money?
|
Ahmad |
Ian |
Total |
Before |
3 u |
13 u |
16 u |
Change |
+ 5 u |
- 5 u |
|
After |
8 u |
8 u |
16 u |
Comparing Ahmad and Ian in the end |
1 |
1 |
|
Amount that Ian has at first = 13 u
13 u = 520
1 u = 520 ÷ 13 = 40
Total amount that Ian and Ahmad have
= 3 u + 13 u
= 16 u
Amount that each of them will have in the end
= 16 u ÷ 2
= 8 u
Amount that Ian must give to Ahmad
= 8 u - 3 u
= 5 u
= 5 x 40
= $200
Answer(s): $200