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 6 days |
60 cents a day |
After 6 days |
80 cents a day |
Fred rented 4 books and was charged $20.80. How many days did he rent the books for?
$1 = 100¢
$20.80 = 20.80 x 100 = 2080¢
Amount that Fred paid for each book
= 2080 ÷ 4
= 520¢
Amount that Fred paid for each book for renting for the first 6 days
= 6 x 60
= 360¢
Additional amount that Fred paid for each book for renting for additional days
= 520 - 360
= 160¢
Number of additional days that Fred rented for each book
= 160 ÷ 80
= 2
Total number of days that Fred rented the books
= 6 + 2
= 8
Answer(s): 8