Question

Jonathan goes out for dinner with his family. They want to give the waiter a 20% tip. Which expression represents the total cost of the bill, including tip, if the cost of the dinner is d dollars? *

Answer 1

Tip percentage = 20% = 20/100 = 0.2 (decimal form)

Cost of the dinner = d

The total cost of the bill:

Multiply the cost of the dinner by (1+0.20).

D (1+0.20)

d 1.20

1.2 d