The ratio of Howard's to Xavier's money is 7 : 10. The ratio of Xavier's to Riordan's money is 4 : 5. If Howard has $238, how much less does Xavier have than Riordan?
| Howard |
Xavier |
Riordan |
| 7x2 |
10x2 |
|
| |
4x5 |
5x5 |
| 14 u |
20 u |
25 u |
The amount that Xavier has is the repeated identity.
Use LCM to make it the same.
LCM of 10 and 4 = 20
Amount that Howard has = 14 u
14 u = 238
1 u = 238 ÷ 14 = 17
Amount that Xavier has less than Riordan
= 25 u - 20 u
= 5 u
= 5 x 17
= $85
Answer(s): $85
