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 |
70 cents a day |
George rented 4 books and was charged $27.60. How many days did he rent the books for?
$1 = 100¢
$27.60 = 27.60 x 100 = 2760¢
Amount that George paid for each book
= 2760 ÷ 4
= 690¢
Amount that George paid for each book for renting for the first 5 days
= 5 x 40
= 200¢
Additional amount that George paid for each book for renting for additional days
= 690 - 200
= 490¢
Number of additional days that George rented for each book
= 490 ÷ 70
= 7
Total number of days that George rented the books
= 5 + 7
= 12
Answer(s): 12