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 9 days |
60 cents a day |
After 9 days |
80 cents a day |
Peter rented 4 books and was charged $37.60. How many days did he rent the books for?
$1 = 100¢
$37.60 = 37.60 x 100 = 3760¢
Amount that Peter paid for each book
= 3760 ÷ 4
= 940¢
Amount that Peter paid for each book for renting for the first 9 days
= 9 x 60
= 540¢
Additional amount that Peter paid for each book for renting for additional days
= 940 - 540
= 400¢
Number of additional days that Peter rented for each book
= 400 ÷ 80
= 5
Total number of days that Peter rented the books
= 9 + 5
= 14
Answer(s): 14