Hi there! The answer is 7%
The price of the book is $ 22.
Santino bought it for $ 23.54.
Therefore, the amount of tax is $ 1.54
Now we can find the sales tax rate by using the following formula:
[tex] tax \: rate = \frac{tax}{price \: excluding \: tax} \times 100\%[/tex]
Filling in gives:
[tex]tax \: rate \: = \frac{1.54}{22} \times 100\% = 7\%[/tex]
