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 4 days |
60 cents a day |
After 4 days |
70 cents a day |
Ethan rented 3 books and was charged $15.60. How many days did he rent the books for?
$1 = 100¢
$15.60 = 15.60 x 100 = 1560¢
Amount that Ethan paid for each book
= 1560 ÷ 3
= 520¢
Amount that Ethan paid for each book for renting for the first 4 days
= 4 x 60
= 240¢
Additional amount that Ethan paid for each book for renting for additional days
= 520 - 240
= 280¢
Number of additional days that Ethan rented for each book
= 280 ÷ 70
= 4
Total number of days that Ethan rented the books
= 4 + 4
= 8
Answer(s): 8