The ratio of Fabian's to Archie's money is 7 : 10. The ratio of Archie's to Zane's money is 3 : 4. If Fabian has $399, how much more does Zane have than Archie?
| Fabian |
Archie |
Zane |
| 7x3 |
10x3 |
|
| |
3x10 |
4x10 |
| 21 u |
30 u |
40 u |
The amount that Archie has is the repeated identity.
Use LCM to make it the same.
LCM of 10 and 3 = 30
Amount that Fabian has = 21 u
21 u = 399
1 u = 399 ÷ 21 = 19
Amount that Zane has more than Archie
= 40 u - 30 u
= 10 u
= 10 x 19
= $190
Answer(s): $190
