Percent of Change, Discount, Tax, Tip

Front

What is the formula to calculate the sale price after a discount?

Back

Sale Price = Original Price - (Discount Percentage × Original Price)

Front

If a product costs $100 and is on sale for 20% off, what is the sale price?

Back

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

Front

What does percent of change represent?

Back

Percent of change represents the difference between the new value and the original value, expressed as a percentage of the original value.

Front

How do you calculate the percent of decrease?

Back

Percent of Decrease = (Original Value - New Value) / Original Value × 100%.

Front

If a shirt originally costs $40 and is now $30, what is the percent of decrease?

Back

Percent of Decrease = ($40 - $30) / $40 × 100% = 25%.

Front

What is a tip and how is it usually calculated?

Back

A tip is a small amount of money given to service workers, typically calculated as a percentage of the total bill.

Front

If your restaurant bill is $50 and you want to leave a 15% tip, how much is the tip?

Back

Tip = 0.15 × $50 = $7.50.

Front

What is sales tax?

Back

Sales tax is a percentage added to the price of goods and services, collected by the seller and paid to the government.

Front

If an item costs $20 and the sales tax is 5%, what is the total cost?

Back

Total Cost = $20 + (0.05 × $20) = $21.

Front

What is the formula to calculate the total cost including tax?

Back

Total Cost = Price + (Sales Tax Rate × Price).