If the sales tax in your city is 10.8%, and an item costs$191 before tax, how much tax would you pay on that item?

In this question it is important to note down all the information's that are already provided. Then the problem would become easy to solve and the correct answer can be reached in no time at all.
Percentage of sales tax charged = 10.8%
Cost of an item before sales tax = $191
Amount of tax that needs to be paid = (10.8/100) * 191
                                                         = 2062.8/100
                                                         = 20.628
                                                         = 20.63
Then the total amount of sales tax that need to be paid is $20.63. I hope the procedure of doing such problems is clear and you got the answer that you were looking for.