The ratio of Tim's to Pierre's money is 6 : 7. The ratio of Pierre's to Julian's money is 4 : 5. If Tim has $312, how much less does Pierre have than Julian?
Tim |
Pierre |
Julian |
6x4 |
7x4 |
|
|
4x7 |
5x7 |
24 u |
28 u |
35 u |
The amount that Pierre has is the repeated identity.
Use LCM to make it the same.
LCM of 7 and 4 = 28
Amount that Tim has = 24 u
24 u = 312
1 u = 312 ÷ 24 = 13
Amount that Pierre has less than Julian
= 35 u - 28 u
= 7 u
= 7 x 13
= $91
Answer(s): $91