Cindy goes to dinner with a friend. The total bill is $16.50. Cindy brought $20.00 with her. What is closest to the maximum amount of tip Cindy can leave the server?


a. 10%
b. 15%
c. 20%
d. 25%

To calculate the maximum amount of tip Cindy can leave, we first need to find out how much change she will receive back from her $20.

Change = $20 - $16.50
Change = $3.50

Now, let's calculate the tip for each option:

a. 10% tip = $16.50 * 0.10 = $1.65
b. 15% tip = $16.50 * 0.15 = $2.48
c. 20% tip = $16.50 * 0.20 = $3.30
d. 25% tip = $16.50 * 0.25 = $4.13

The maximum amount of tip Cindy can leave the server is $3.50, which is closest to the 20% tip (option c).

Therefore, the answer is c. 20%.