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 |
20 cents a day |
After 8 days |
70 cents a day |
Albert rented 2 books and was charged $8.80. How many days did he rent the books for?
$1 = 100¢
$8.80 = 8.80 x 100 = 880¢
Amount that Albert paid for each book
= 880 ÷ 2
= 440¢
Amount that Albert paid for each book for renting for the first 8 days
= 8 x 20
= 160¢
Additional amount that Albert paid for each book for renting for additional days
= 440 - 160
= 280¢
Number of additional days that Albert rented for each book
= 280 ÷ 70
= 4
Total number of days that Albert rented the books
= 8 + 4
= 12
Answer(s): 12