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 6 days |
30 cents a day |
After 6 days |
70 cents a day |
Fabian rented 2 books and was charged $13.40. How many days did he rent the books for?
$1 = 100¢
$13.40 = 13.40 x 100 = 1340¢
Amount that Fabian paid for each book
= 1340 ÷ 2
= 670¢
Amount that Fabian paid for each book for renting for the first 6 days
= 6 x 30
= 180¢
Additional amount that Fabian paid for each book for renting for additional days
= 670 - 180
= 490¢
Number of additional days that Fabian rented for each book
= 490 ÷ 70
= 7
Total number of days that Fabian rented the books
= 6 + 7
= 13
Answer(s): 13