Gem, Elyse and Julie had a sum of money. The amount of money Gem had was
25 of the amount of money Elyse had. The ratio of the amount of money Elyse had to the total amount of money Julie and Elyse had was 4: 9. After Julie gave $70 to Elyse, she had as much money as Elyse. How much more money did Julie have than Gem in the end?
Gem |
Elyse |
Julie |
2x4 = 8 u |
5x4 = 20 u |
|
|
4x5 = 20 u |
5x5 = 25 u |
8 u |
20 u |
25 u |
The amount that Elyse had is the repeated identity. Make the amount that Elyse had the same. LCM of 5 and 4 is 20.
|
Gem |
Elyse |
Julie |
Before |
8 u |
20 u |
25 u |
Change |
No change |
+ 70 |
- 70 |
After |
8 u |
20 u + 70 |
25 u - 70 |
The amount that Julie and Elyse had in the end is the same.
25 u - 70 = 20 u + 70
25 u - 20 u = 70 + 70
5 u = 140
1 u = 140 ÷ 5 = 28
Amount that Julie had more than Gem in the end
= 25 u - 70 - 8 u
= 17 u - 70
= 17 x 28 - 70
= 476 - 70
= $406
Answer(s): $406