A book rental shop rented out books and the rate of rental charges are shown in the table.
Number of days |
Rates |
After the first 2 days |
50 cents a day |
After 2 days |
80 cents a day |
Gabriel rented 2 books and was charged $13.20. How many days did he rent the books for?
$1 = 100¢
$13.20 = 13.20 x 100 = 1320¢
Amount that Gabriel paid for each book
= 1320 ÷ 2
= 660¢
Amount that Gabriel paid for each book for renting for the first 2 days
= 2 x 50
= 100¢
Additional amount that Gabriel paid for each book for renting for additional days
= 660 - 100
= 560¢
Number of additional days that Gabriel rented for each book
= 560 ÷ 80
= 7
Total number of days that Gabriel rented the books
= 2 + 7
= 9
Answer(s): 9