The ratio of Vincent's to Mark's money is 7 : 6. The ratio of Mark's to Cole's money is 3 : 4. If Vincent has $98, how much less does Mark have than Cole?
Vincent |
Mark |
Cole |
7x1 |
6x1 |
|
|
3x2 |
4x2 |
7 u |
6 u |
8 u |
The amount that Mark has is the repeated identity.
Use LCM to make it the same.
LCM of 6 and 3 = 6
Amount that Vincent has = 7 u
7 u = 98
1 u = 98 ÷ 7 = 14
Amount that Mark has less than Cole
= 8 u - 6 u
= 2 u
= 2 x 14
= $28
Answer(s): $28