The ratio of Charlie's money to Adam's money is 7 : 3.
The ratio of Adam's money to Bryan's money is 9 : 4.
The total amount that they have is $306.
How much less money does Bryan have than Charlie?
Charlie |
Adam |
Bryan |
7 x 3 |
3 x 3 |
|
|
9 x 1 |
4 x 1 |
21 u |
9 u |
4 u |
Amount that Adam has is the repeated identity.
Make the amount that Adam has the same using the LCM of 3 and 9.
LCM of 3 and 9 = 9
Charlie : Adam : Bryan
21 : 9 : 4
Total amount that Charlie, Adam and Bryan have
= 21 u + 9 u + 4 u
= 34 u
34 u = 306
1 u = 306 ÷ 34 = 9
Amount that Bryan has less than Charlie
= 21 u - 4 u
= 17 u
= 17 x 9
= $153
Answer(s): $153