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 5 days |
60 cents a day |
After 5 days |
70 cents a day |
Paul rented 3 books and was charged $25.80. How many days did he rent the books for?
$1 = 100¢
$25.80 = 25.80 x 100 = 2580¢
Amount that Paul paid for each book
= 2580 ÷ 3
= 860¢
Amount that Paul paid for each book for renting for the first 5 days
= 5 x 60
= 300¢
Additional amount that Paul paid for each book for renting for additional days
= 860 - 300
= 560¢
Number of additional days that Paul rented for each book
= 560 ÷ 70
= 8
Total number of days that Paul rented the books
= 5 + 8
= 13
Answer(s): 13