Your bill comes to $67.21, and you and your friends all put in $72.00, but is that enough tip? No, thats only 7%. This is the problem that Reverse Tip Calculator solves for you.
Enter the amount on your bill, then enter either the total you are paying, or the amount you are thinking about leaving as a tip, and Reverse Tip Calculator will tell you how much of a tip you are leaving in percent.