Final answer:
To find the tip percent Madeline left, we calculate the difference between the amount paid and the cost of the meal, then divide the tip amount by the meal cost and multiply by 100. Similarly, to calculate the total amount paid by Jerod at the restaurant, add the food cost, tax, and tip. The Green family's total meal cost includes the meal price plus an 18% tip.
Step-by-step explanation:
Finding Total Bills Involving Tips and Taxes
To answer Madeline's question, let's first calculate the percent tip she left at the restaurant. Since the cost of her meal was $13 and she paid $15.34 after the tip, the tip amount would be $15.34 - $13 = $2.34.
To find the percent tip, you divide the tip amount by the cost of the meal and then multiply by 100 to get a percentage. That's $2.34 ÷ $13 × 100 = 18% tip.
Using this method, let's calculate Jerod's total bill. The food came to $47.50, and with a 6% sales tax, we get 0.06 × $47.50 = $2.85 tax. If they decide to leave an 18% tip, we then convert this percent to a decimal and multiply by the cost of the meal, which results in $47.50 × 0.18 = $8.55 tip. The final amount paid including sales tax and tip would be $47.50 + $2.85 + $8.55 = $58.90.
Similarly, for the Green family, their meal cost $72, and with an 18% restaurant-added tip, they would pay an additional $72 × 0.18 = $12.96 in tips. Thus, the total cost of their meal including the tip would be $72 + $12.96 = $84.96.