Apack of cinnamon-scented pencils sells for $8.00. what is the sales tax rate if the total cost of the pencils is $8.64?

Selling price of a pack of cinnamon scented pencils = $8
Cost of the pack of pencils along with tax = $8.64
Then
Amount of tax taken = (8.64 - 8.00) dollars
                                 = 0.64 dollars
Percentage of sales tax taken = (0.64/8.00) * 100
                                                 = 64/8
                                                 = 8 percent
So the rate of sales tax for the pack of cinnamon scented pencils is 8%. I hope the procedure is clear enough for you to understand. You can use this method for solving similar problems without requiring any help from outside.