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 8 days |
50 cents a day |
After 8 days |
90 cents a day |
George rented 2 books and was charged $20.60. How many days did he rent the books for?
$1 = 100¢
$20.60 = 20.60 x 100 = 2060¢
Amount that George paid for each book
= 2060 ÷ 2
= 1030¢
Amount that George paid for each book for renting for the first 8 days
= 8 x 50
= 400¢
Additional amount that George paid for each book for renting for additional days
= 1030 - 400
= 630¢
Number of additional days that George rented for each book
= 630 ÷ 90
= 7
Total number of days that George rented the books
= 8 + 7
= 15
Answer(s): 15