Luis and David had some money at first. Luis received 3 times as much money as David every fortnight. At the end of 8 fortnights, both of them had the same amount of money. If David had $1360 at first and Luis had $1760 at the end of those 8 fortnights, what is the ratio of Luis's money to the total amount of money at first?
| |
Luis |
David |
| Before |
? |
$1360 |
| Change |
+ 3 u |
+ 1 u |
| After |
$1760 |
$1760 |
Amount that David received every fortnight
= 1760 - 1360
= $400
1 u = 400
Amount that Luis received every fortnight
= 3 u
= 3 x 400
= $1200
Amount that Luis had at first
= 1760 - 1200
= $560
Total amount that Luis and David had at first
= 1360 + 560
= $1920
Luis's amount : Total amount
560 : 1920
7 : 24
Answer(s): 7 : 24
