Nancy is very happy with the service at the hotel she is staying in. She wants to tip the room service waiter 15 percent of the food bill, which is $120.75. How much should she tip?
$18.11 because 20.75/x=100/15 (120.75/x)x=(100/15)x - we multiply both sides of the equation by x 120.75=6.6666666666667*x - we divide both sides of the equation by (6.6666666666667) to get x 120.75/6.6666666666667=x 18.1125=x x=18.1125
