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 2 days |
50 cents a day |
After 2 days |
90 cents a day |
Fred rented 2 books and was charged $9.20. How many days did he rent the books for?
$1 = 100¢
$9.20 = 9.20 x 100 = 920¢
Amount that Fred paid for each book
= 920 ÷ 2
= 460¢
Amount that Fred paid for each book for renting for the first 2 days
= 2 x 50
= 100¢
Additional amount that Fred paid for each book for renting for additional days
= 460 - 100
= 360¢
Number of additional days that Fred rented for each book
= 360 ÷ 90
= 4
Total number of days that Fred rented the books
= 2 + 4
= 6
Answer(s): 6