Final answer:
To calculate the total cost of Amy's lunch including a 6.75% sales tax, convert the sales tax percentage to a decimal (0.0675), multiply it by the cost of the meal ($12.83), round to the nearest cent, and add it to the original cost. The total cost of the lunch is $13.70.
Step-by-step explanation:
To find the total cost of Amy's lunch including the 6.75% sales tax, we need to first convert the percentage to a decimal. To do this, divide 6.75 by 100, which gives us 0.0675. We then multiply this decimal by the cost of the meal, which is $12.83. So, the calculation for the sales tax amount is 0.0675 × $12.83.
Once we have the amount of sales tax, we add it to the original price of the meal to get the total cost. Therefore, the calculation is:
Sales Tax = 0.0675 × $12.83
Total Cost = Original Cost + Sales Tax
Example Calculation
First, find the amount of sales tax:
Sales Tax = 0.0675 × $12.83 = $0.865775
Since we're dealing with money, we round the sales tax to the nearest cent, which is $0.87.
Now, add the sales tax to the original cost of the meal to get the total cost:
Total Cost = $12.83 + $0.87 = $13.70
Therefore, the total cost of Amy's lunch, including the sales tax, is $13.70.