Answer:
Matthew was charged 5.5% in sales tax.
Step-by-step explanation:
The percent change of an item can be found using the following equation:
[tex]\frac{new cost - original cost}{original cost} x 100[/tex]
In the problem, the original cost of the textbook is $108.00 and the cost after tax is $113.94:
[tex]\frac{113.94 - 108.00}{108.00} =\frac{5.94}{108} x 100 = 5.5%[/tex]
So, the rate of sales tax that Matthew was charged is 5.5%.
