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 |
70 cents a day |
Jenson rented 2 books and was charged $15.20. How many days did he rent the books for?
$1 = 100¢
$15.20 = 15.20 x 100 = 1520¢
Amount that Jenson paid for each book
= 1520 ÷ 2
= 760¢
Amount that Jenson paid for each book for renting for the first 9 days
= 9 x 30
= 270¢
Additional amount that Jenson paid for each book for renting for additional days
= 760 - 270
= 490¢
Number of additional days that Jenson rented for each book
= 490 ÷ 70
= 7
Total number of days that Jenson rented the books
= 9 + 7
= 16
Answer(s): 16