The ratio of Ryan's money to Ethan's money is 7 : 11. If Ethan has $495, how much must he give to Ryan so both will have the equal amount of money?
| |
Ryan |
Ethan |
Total |
| Before |
7 u |
11 u |
18 u |
| Change |
+ 2 u |
- 2 u |
|
| After |
9 u |
9 u |
18 u |
Comparing Ryan and
Ethan in the end |
1 |
1 |
|
Amount that Ethan has at first = 11 u
11 u = 495
1 u = 495 ÷ 11 = 45
Total amount that Ethan and Ryan have
= 7 u + 11 u
= 18 u
Amount that each of them will have in the end
= 18 u ÷ 2
= 9 u
Amount that Ethan must give to Ryan
= 9 u - 7 u
= 2 u
= 2 x 45
= $90
Answer(s): $90
