To calculate the total bill including a 15% tip, you can use the following formula:
Total Bill = Bill Amount + Tip
Given:
Bill Amount = $123.50
Tip Percentage = 15% (or 0.15 as a decimal)
Now, calculate the tip amount:
Tip = Bill Amount * Tip Percentage
Tip = $123.50 * 0.15
Tip = $18.525
Now, add the tip to the bill amount to find the total bill:
Total Bill = $123.50 + $18.525
Total Bill = $142.025
So, the total bill including the 15% tip will be $142.03 (rounded to the nearest cent).