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 8 days |
40 cents a day |
After 8 days |
50 cents a day |
Bryan rented 4 books and was charged $16.80. How many days did he rent the books for?
$1 = 100¢
$16.80 = 16.80 x 100 = 1680¢
Amount that Bryan paid for each book
= 1680 ÷ 4
= 420¢
Amount that Bryan paid for each book for renting for the first 8 days
= 8 x 40
= 320¢
Additional amount that Bryan paid for each book for renting for additional days
= 420 - 320
= 100¢
Number of additional days that Bryan rented for each book
= 100 ÷ 50
= 2
Total number of days that Bryan rented the books
= 8 + 2
= 10
Answer(s): 10