Final answer:
To find the total cost of the dinner, which was $72, with an 18% tip, calculate the tip amount by multiplying $72 by 0.18 to get $12.96. Then add the tip to the original cost to get the total of $84.96.
Step-by-step explanation:
The student is tasked with calculating the total cost of a dinner, including an 18% tip. To determine the additional cost of the tip, we follow these steps:
-
- Calculate the tip amount by multiplying the cost of the meal by the percentage of the tip.
-
- Convert the tip percentage into decimal form by dividing it by 100.
-
- Add the tip amount to the original cost to find the total cost of the dinner.
For the given problem:
-
- Cost of the meal = $72
-
- Tip percentage = 18%
-
- Tip as decimal = 0.18
-
- Amount of tip = $72 * 0.18 = $12.96
-
- Total cost of dinner = $72 + $12.96 = $84.96
Therefore, the total cost of the dinner, including the tip, is $84.96.