The ratio of Tommy's to Albert's money is 7 : 8. The ratio of Albert's to Carl's money is 3 : 4. If Tommy has $378, how much less does Albert have than Carl?
Tommy |
Albert |
Carl |
7x3 |
8x3 |
|
|
3x8 |
4x8 |
21 u |
24 u |
32 u |
The amount that Albert has is the repeated identity.
Use LCM to make it the same.
LCM of 8 and 3 = 24
Amount that Tommy has = 21 u
21 u = 378
1 u = 378 ÷ 21 = 18
Amount that Albert has less than Carl
= 32 u - 24 u
= 8 u
= 8 x 18
= $144
Answer(s): $144