The silver tell people went to a fancy restaurant after the big TV Grammy gave the survey $15 tip if the tip is 20% of the cost of dinner how much was dinner

The dinner was $75

Step-by-step explanation:

First we need to determine the tip

We know the tip was $15 and the tip rate was 20 %

tip = cost of the dinner * tip rate

Substitute the known values in

15 = cost of the dinner *.2

Divide each side by. 2

15/.2 = cost of the dinner *.2/.2

75 = cost of the dinner