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 4 days |
50 cents a day |
After 4 days |
90 cents a day |
John rented 5 books and was charged $32.50. How many days did he rent the books for?
$1 = 100¢
$32.50 = 32.50 x 100 = 3250¢
Amount that John paid for each book
= 3250 ÷ 5
= 650¢
Amount that John paid for each book for renting for the first 4 days
= 4 x 50
= 200¢
Additional amount that John paid for each book for renting for additional days
= 650 - 200
= 450¢
Number of additional days that John rented for each book
= 450 ÷ 90
= 5
Total number of days that John rented the books
= 4 + 5
= 9
Answer(s): 9