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 5 days |
40 cents a day |
After 5 days |
60 cents a day |
Brandon rented 4 books and was charged $12.80. How many days did he rent the books for?
$1 = 100¢
$12.80 = 12.80 x 100 = 1280¢
Amount that Brandon paid for each book
= 1280 ÷ 4
= 320¢
Amount that Brandon paid for each book for renting for the first 5 days
= 5 x 40
= 200¢
Additional amount that Brandon paid for each book for renting for additional days
= 320 - 200
= 120¢
Number of additional days that Brandon rented for each book
= 120 ÷ 60
= 2
Total number of days that Brandon rented the books
= 5 + 2
= 7
Answer(s): 7