Percentages Review 2024

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

Front

How do you calculate sales tax?

Back

To calculate sales tax, multiply the original price by the sales tax rate (as a decimal) and then add that amount to the original price.

Front

What is a tip and how is it calculated?

Back

A tip is a small amount of money given to someone for their service. It is usually calculated as a percentage of the total bill.

Front

How do you find the total cost after tax and tip?

Back

Add the original price to the sales tax amount and the tip amount to find the total cost.

Front

What is the formula for calculating percent error?

Back

Percent Error = |(Estimated Value - Actual Value)| / Actual Value x 100%.

Front

If an item costs $100 and has a sales tax of 8%, what is the total cost?

Back

Total Cost = $100 + ($100 x 0.08) = $108.

Front

If a dress costs $24 and the total paid is $25.92, what is the tax rate?

Back

Tax Rate = (Total Paid - Original Price) / Original Price x 100% = ($25.92 - $24) / $24 x 100% = 8%.

Front

What does a 15% discount mean?

Back

A 15% discount means that the price is reduced by 15% of the original price.

Front

How do you calculate the original price from a discounted price?

Back

Original Price = Discounted Price / (1 - Discount Rate).

Front

If a tip is $14.99 and it represents 20% of the bill, how do you find the original bill?

Back

Original Bill = Tip / Tip Percentage = $14.99 / 0.20 = $74.95.