Answer: The required percentage is 33.02%.
Step-by-step explanation: Given that a bookstore owner is having a sale. The book Bart wants was originally priced at $14.99 the book is now $10.04.
We are to find the percentage by which the price was reduced.
The price by which the price of the book reduced is given by
R.P. = $(14.99 - 10.04) = $4.95.
Therefore, the percentage by which the price of the book reduced is given by
[tex]P=\dfrac{4.95}{14.99}\times 100\%\\\\=33.02\%[/tex]
Thus, the required percentage is 33.02%.