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 |
60 cents a day |
After 2 days |
80 cents a day |
John rented 3 books and was charged $25.20. How many days did he rent the books for?
$1 = 100¢
$25.20 = 25.20 x 100 = 2520¢
Amount that John paid for each book
= 2520 ÷ 3
= 840¢
Amount that John paid for each book for renting for the first 2 days
= 2 x 60
= 120¢
Additional amount that John paid for each book for renting for additional days
= 840 - 120
= 720¢
Number of additional days that John rented for each book
= 720 ÷ 80
= 9
Total number of days that John rented the books
= 2 + 9
= 11
Answer(s): 11