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 |
50 cents a day |
After 5 days |
70 cents a day |
Andy rented 4 books and was charged $18.40. How many days did he rent the books for?
$1 = 100¢
$18.40 = 18.40 x 100 = 1840¢
Amount that Andy paid for each book
= 1840 ÷ 4
= 460¢
Amount that Andy paid for each book for renting for the first 5 days
= 5 x 50
= 250¢
Additional amount that Andy paid for each book for renting for additional days
= 460 - 250
= 210¢
Number of additional days that Andy rented for each book
= 210 ÷ 70
= 3
Total number of days that Andy rented the books
= 5 + 3
= 8
Answer(s): 8