Question

Mark deposits a book at Barnes and noble for $16.99$. The sales tax was $8\%$. How much is the tax, and what was the total cost of the book?

Answer 1

Hint:We have been clearly given the price of the book and the sales tax. Try to first find the tax applicable on the book using the sales tax given. After this the total price of the book will be the original price of the book added to tax on the book. There is no formula required to solve this question.

Complete step by step answer:
We will first try to find how much tax Mark spent on the book.Since it is given to us that the sales tax was 8%, sales tax on one book will be the price of book times 8%.That is,
$16.99 \times 8\% = 16.99 \times \dfrac{8}{{100}} \\
\Rightarrow 16.99 \times 8\%= 16.99 \times 0.08 \\
\Rightarrow 16.99 \times 8\%= 1.36$
Hence the tax paid by Mark on one book is $1.36$ respectively.
Therefore the total amount mark paid = cost of the book + tax
$\text{Total amount}= 16.99 + 1.36 \\
\therefore\text{Total amount}= 18.35 \\ $
Hence the total amount of the book including tax Mark paid was $18.35$.

Note:This kind of questions are generally based on using logic and basic formula. As in this case you have to use the idea that the total cost of the book will be tax on the book plus the original price of the book. Start with what is given to you and just keep proceeding with the information and mere logic.