Question

Kenneth took a friend for a birthday dinner. The total bill for dinner was $40.69 (including tax and a tip).  If Kenneth paid a 20.8% tip, what was his bill before adding the tip?

Answer 1

$40.69 represents 120.8% of the cost of the meal, so the meal without tip=40.69/1.208=$33.68. (20.8% of this is about $7.01 and 7.01+33.68=$40.69.)