The ratio of Reggie's to Elijah's money is 5 : 4. The ratio of Elijah's to Tom's money is 3 : 5. If Reggie has $270, how much less does Elijah have than Tom?
| Reggie |
Elijah |
Tom |
| 5x3 |
4x3 |
|
| |
3x4 |
5x4 |
| 15 u |
12 u |
20 u |
The amount that Elijah has is the repeated identity.
Use LCM to make it the same.
LCM of 4 and 3 = 12
Amount that Reggie has = 15 u
15 u = 270
1 u = 270 ÷ 15 = 18
Amount that Elijah has less than Tom
= 20 u - 12 u
= 8 u
= 8 x 18
= $144
Answer(s): $144
