Description: Sal solves percent word problems involving tax, tip, and discounts. Well, let's think about how your sales tax is calculated. Your sales tax would be equal to the sales tax rate, I'll just call that the rate, so that's going to be equal to the rate times your original price. So 72 cents is going to be equal to my sales tax rate, they also tell us that, that is 6%, is going to be equal to 6% times my original price and that's what they're asking for, the original price.*Teacher Advisor is 100% free.