Answer:
= $ 49.5
Explanation:
We are given;
- Discount off retail price is 20%
- Retail price is $55
Required to determine the amount paid
Taking the retail price as 100%
Then, amount paid will be (100 % - 10%) 90% of the retail price
Therefore;
Amount paid = 90% × $ 55
= 0.9 × $ 55
= $ 49.5
Thus, the employee paid $ 49.5 for the book.