The ratio of Ryan's to Albert's money is 7 : 9. The ratio of Albert's to Julian's money is 3 : 4. If Ryan has $126, how much less does Albert have than Julian?
Ryan |
Albert |
Julian |
7x1 |
9x1 |
|
|
3x3 |
4x3 |
7 u |
9 u |
12 u |
The amount that Albert has is the repeated identity.
Use LCM to make it the same.
LCM of 9 and 3 = 9
Amount that Ryan has = 7 u
7 u = 126
1 u = 126 ÷ 7 = 18
Amount that Albert has less than Julian
= 12 u - 9 u
= 3 u
= 3 x 18
= $54
Answer(s): $54