Basic Percents

Front

What is a percent?

Back

A percent is a way to express a number as a fraction of 100. It is often used to compare ratios and express how much of something there is in relation to a whole.

Front

How do you calculate the total cost after tax?

Back

To calculate the total cost after tax, multiply the original price by the tax rate (as a decimal), then add that amount to the original price. Formula: Total Cost = Original Price + (Original Price × Tax Rate).

Front

What is a tip and how is it calculated?

Back

A tip is a small amount of money given to service workers for their service. It is usually calculated as a percentage of the total bill. Formula: Tip = Total Bill × Tip Rate.

Front

How do you calculate a discount?

Back

To calculate a discount, multiply the original price by the discount rate (as a decimal), then subtract that amount from the original price. Formula: Sale Price = Original Price - (Original Price × Discount Rate).

Front

What is the formula to find the new price after a discount?

Back

New Price = Original Price - (Original Price × Discount Rate).

Front

How do you find the percentage decrease?

Back

To find the percentage decrease, subtract the new value from the original value, divide by the original value, and multiply by 100. Formula: Percentage Decrease = ((Original Value - New Value) / Original Value) × 100.

Front

If an item costs $100 and has a 20% discount, what is the sale price?

Back

Sale Price = $100 - ($100 × 0.20) = $100 - $20 = $80.

Front

What is the total cost if the original price is $50 and the tax rate is 8%?

Back

Total Cost = $50 + ($50 × 0.08) = $50 + $4 = $54.

Front

How do you calculate the total amount paid including tip?

Back

Total Amount Paid = Total Bill + (Total Bill × Tip Rate).

Front

If a meal costs $30 and you leave a 15% tip, how much do you pay in total?

Back

Total = $30 + ($30 × 0.15) = $30 + $4.50 = $34.50.