The ratio of Charlie's money to Adam's money is 4 : 1.
The ratio of Adam's money to Bryan's money is 7 : 5.
The total amount that they have is $280.
How much more money does Charlie have than Bryan?
Charlie |
Adam |
Bryan |
4 x 7 |
1 x 7 |
|
|
7 x 1 |
5 x 1 |
28 u |
7 u |
5 u |
Amount that Adam has is the repeated identity.
Make the amount that Adam has the same using the LCM of 1 and 7.
LCM of 1 and 7 = 7
Charlie : Adam : Bryan
28 : 7 : 5
Total amount that Charlie, Adam and Bryan have
= 28 u + 7 u + 5 u
= 40 u
40 u = 280
1 u = 280 ÷ 40 = 7
Amount that Charlie has more than Bryan
= 28 u - 5 u
= 23 u
= 23 x 7
= $161
Answer(s): $161