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.