Final answer:
To calculate a 15% tip on Lucia's $65 dinner bill, convert the percentage to a decimal and multiply by the bill amount to get a tip of $9.75. Add the tip to the original bill for a total of $74.75.
Step-by-step explanation:
Calculating a Restaurant Bill with Tip
Lucia's family dined at TGIF where their dinner bill was $65. To calculate a 15% tip, convert the percentage to a decimal by dividing by 100, which gives us 0.15. Multiply this decimal by the bill amount to find the tip:
To find the total bill amount, add the tip to the original bill:
- Total = Bill + Tip = $65 + $9.75 = $74.75
Therefore, Lucia's family will pay a total of $74.75, including the tip.