Question

 A restaurant customer left ​$2.20 as a tip. The tax was 7% and the tip was 20% of the after tax cost. Which information is not needed to compute the bill after tax and​ tip? What was the total​ bill?

Answer 1

If you take the 20% and multiply it by the tip that was given (2.20), you would get 11$. The total bill including tip would be $13.20. The tax percent was unneeded since we already received the information that the tip was a percentage of the cost AFTER the tax.