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 |
60 cents a day |
After 7 days |
80 cents a day |
Oscar rented 2 books and was charged $14.80. How many days did he rent the books for?
$1 = 100¢
$14.80 = 14.80 x 100 = 1480¢
Amount that Oscar paid for each book
= 1480 ÷ 2
= 740¢
Amount that Oscar paid for each book for renting for the first 7 days
= 7 x 60
= 420¢
Additional amount that Oscar paid for each book for renting for additional days
= 740 - 420
= 320¢
Number of additional days that Oscar rented for each book
= 320 ÷ 80
= 4
Total number of days that Oscar rented the books
= 7 + 4
= 11
Answer(s): 11