The ratio of Ryan's to Rael's money is 7 : 6. The ratio of Rael's to Tom's money is 3 : 4. If Ryan has $133, how much less does Rael have than Tom?
| Ryan |
Rael |
Tom |
| 7x1 |
6x1 |
|
| |
3x2 |
4x2 |
| 7 u |
6 u |
8 u |
The amount that Rael has is the repeated identity.
Use LCM to make it the same.
LCM of 6 and 3 = 6
Amount that Ryan has = 7 u
7 u = 133
1 u = 133 ÷ 7 = 19
Amount that Rael has less than Tom
= 8 u - 6 u
= 2 u
= 2 x 19
= $38
Answer(s): $38
