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 |
80 cents a day |
Harry rented 4 books and was charged $26.80. How many days did he rent the books for?
$1 = 100¢
$26.80 = 26.80 x 100 = 2680¢
Amount that Harry paid for each book
= 2680 ÷ 4
= 670¢
Amount that Harry paid for each book for renting for the first 9 days
= 9 x 30
= 270¢
Additional amount that Harry paid for each book for renting for additional days
= 670 - 270
= 400¢
Number of additional days that Harry rented for each book
= 400 ÷ 80
= 5
Total number of days that Harry rented the books
= 9 + 5
= 14
Answer(s): 14