The ratio of Bryan's money to Adam's money is 5 : 4.
The ratio of Adam's money to Charlie's money is 7 : 4.
The total amount that they have is $158.
How much less money does Charlie have than Bryan?
Bryan |
Adam |
Charlie |
5 x 7 |
4 x 7 |
|
|
7 x 4 |
4 x 4 |
35 u |
28 u |
16 u |
Amount that Adam has is the repeated identity.
Make the amount that Adam has the same using the LCM of 4 and 7.
LCM of 4 and 7 = 28
Bryan : Adam : Charlie
35 : 28 : 16
Total amount that Bryan, Adam and Charlie have
= 35 u + 28 u + 16 u
= 79 u
79 u = 158
1 u = 158 ÷ 79 = 2
Amount that Charlie has less than Bryan
= 35 u - 16 u
= 19 u
= 19 x 2
= $38
Answer(s): $38