Question

Chase goes to a restaurant and the subtotal on the bill was xx dollars. A tax of 7% is applied to the bill. Chase decides to leave a tip of 15% on the entire bill (including the tax). Write an expression in terms of xx that represents the total amount that Chase paid.

Answer 1

From the information given, the subtotal on the bill was $x. A tax of 7% was applied on this amount. Recall, percentage is expresed in terms of 100. This means that the amount of tax charged is

7/100 * x = 0.07x

Amount of bill including tax = initial amount + tax

Amount of bill including tax = x + 0.07x = 1.07x

Chase decides to leave a tip of 15% on the entire bill (including the tax). This means that the amount paid as tip is

15/100 * 1.07x = 0.1605x

Total amount paid = amount of bill including tax + amount of tip

Total amount paid = 1.07x + 0.1605x = 1.2305x

The expression for the total amount paid in terms of x is 1.2305x