The ratio of Luke's to Luis's money is 7 : 10. The ratio of Luis's to Neave's money is 3 : 5. If Luke has $210, how much less does Luis have than Neave?
| Luke |
Luis |
Neave |
| 7x3 |
10x3 |
|
| |
3x10 |
5x10 |
| 21 u |
30 u |
50 u |
The amount that Luis has is the repeated identity.
Use LCM to make it the same.
LCM of 10 and 3 = 30
Amount that Luke has = 21 u
21 u = 210
1 u = 210 ÷ 21 = 10
Amount that Luis has less than Neave
= 50 u - 30 u
= 20 u
= 20 x 10
= $200
Answer(s): $200
