The ratio of Mark's to Justin's money is 5 : 3. The ratio of Justin's to Charlie's money is 3 : 5. If Mark has $95, how much more does Charlie have than Justin?
| Mark |
Justin |
Charlie |
| 5x1 |
3x1 |
|
| |
3x1 |
5x1 |
| 5 u |
3 u |
5 u |
The amount that Justin has is the repeated identity.
Use LCM to make it the same.
LCM of 3 and 3 = 3
Amount that Mark has = 5 u
5 u = 95
1 u = 95 ÷ 5 = 19
Amount that Charlie has more than Justin
= 5 u - 3 u
= 2 u
= 2 x 19
= $38
Answer(s): $38
