Given:
Original selling price of a book = $45
Discount Rate = 15%
To find:
The cost of the book in dollars, the customer pays for the discounted price of the book.
Solution:
We know that,
Discounted price = Original price - Discount
= Original price - 15% of original price
![=45-(15)/(100)(45)](https://img.qammunity.org/2022/formulas/mathematics/high-school/pv3a2rsrdbppnj2pytckh04jybprpxdet2.png)
![=45-6.75](https://img.qammunity.org/2022/formulas/mathematics/high-school/3u3wpmhs0pz7hovzh7ty4i62ywp8tnrmfy.png)
![=38.25](https://img.qammunity.org/2022/formulas/mathematics/high-school/bawpc8evcmxmfe8cveo8ujwhkh4k983mm9.png)
Therefore, the discounted price of the book is $38.25. So, the cost of the book after discount is $38.25.