Bobby and Brandon had some money at first. Bobby received 2 times as much money as Brandon every month. At the end of 2 months, both of them had the same amount of money. If Brandon had $1500 at first and Bobby had $2400 at the end of those 2 months, what is the ratio of Bobby's money to the total amount of money at first?
| |
Bobby |
Brandon |
| Before |
? |
$1500 |
| Change |
+ 2 u |
+ 1 u |
| After |
$2400 |
$2400 |
Amount that Brandon received every month
= 2400 - 1500
= $900
1 u = 900
Amount that Bobby received every month
= 2 u
= 2 x 900
= $1800
Amount that Bobby had at first
= 2400 - 1800
= $600
Total amount that Bobby and Brandon had at first
= 1500 + 600
= $2100
Bobby's amount : Total amount
600 : 2100
2 : 7
Answer(s): 2 : 7
