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 9 days |
30 cents a day |
After 9 days |
40 cents a day |
Howard rented 5 books and was charged $27.50. How many days did he rent the books for?
$1 = 100¢
$27.50 = 27.50 x 100 = 2750¢
Amount that Howard paid for each book
= 2750 ÷ 5
= 550¢
Amount that Howard paid for each book for renting for the first 9 days
= 9 x 30
= 270¢
Additional amount that Howard paid for each book for renting for additional days
= 550 - 270
= 280¢
Number of additional days that Howard rented for each book
= 280 ÷ 40
= 7
Total number of days that Howard rented the books
= 9 + 7
= 16
Answer(s): 16