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 |
30 cents a day |
After 4 days |
70 cents a day |
Howard rented 5 books and was charged $23.50. How many days did he rent the books for?
$1 = 100¢
$23.50 = 23.50 x 100 = 2350¢
Amount that Howard paid for each book
= 2350 ÷ 5
= 470¢
Amount that Howard paid for each book for renting for the first 4 days
= 4 x 30
= 120¢
Additional amount that Howard paid for each book for renting for additional days
= 470 - 120
= 350¢
Number of additional days that Howard rented for each book
= 350 ÷ 70
= 5
Total number of days that Howard rented the books
= 4 + 5
= 9
Answer(s): 9