Question

Indigo goes out to lunch. The bill, before tax and tip, was $10.85. A sales tax of 3%

was added on. Indigo tipped 18% on the amount after the sales tax was added. The
total cost of the meal plus tip and tax was more than the cost of the bill by what
percent? Round to the nearest whole number.

Answer 1

To find the total cost of the meal plus tip and tax, first calculate the sales tax by multiplying the bill by the tax rate.

Step-by-step explanation:

To find the total cost of the meal plus tip and tax, we need to calculate the sales tax and the tip amount separately and then add them to the original bill.

First, let's calculate the sales tax. We know that the bill before tax was $10.85 and the sales tax is 3%.

To find the sales tax amount, we can multiply the bill by the sales tax rate:

$10.85 x 0.03 = $0.3255 (rounded to $0.33)

Next, we need to calculate the tip amount on the total bill, including the sales tax. Since the tip is 18%, we can multiply the total bill (before the tip) by the tip rate:

Total bill after tax = $10.85 + $0.33 = $11.18

Tip amount = $11.18 x 0.18 = $2.0084 (rounded to $2.01)

Now we can calculate the total cost of the meal plus tip and tax by adding the original bill, the sales tax, and the tip amount:

Total cost = $10.85 + $0.33 + $2.01 = $13.19

Finally, to find the percentage increase, we can subtract the original bill from the total cost, divide by the original bill, and multiply by 100:

Percentage increase = (($13.19 - $10.85) / $10.85) x 100 ≈ 21%