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 7 days |
30 cents a day |
After 7 days |
80 cents a day |
Fabian rented 4 books and was charged $37.20. How many days did he rent the books for?
$1 = 100¢
$37.20 = 37.20 x 100 = 3720¢
Amount that Fabian paid for each book
= 3720 ÷ 4
= 930¢
Amount that Fabian paid for each book for renting for the first 7 days
= 7 x 30
= 210¢
Additional amount that Fabian paid for each book for renting for additional days
= 930 - 210
= 720¢
Number of additional days that Fabian rented for each book
= 720 ÷ 80
= 9
Total number of days that Fabian rented the books
= 7 + 9
= 16
Answer(s): 16