Percents and Percent Proportions

Front

What is a percent?

Back

A percent is a ratio expressed as a fraction of 100. It represents a part of a whole.

Front

How do you calculate a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, 25% of 80 is calculated as 80 * 0.25 = 20.

Front

What is the formula for finding the new salary after a raise?

Back

New Salary = Original Salary + (Raise Percentage × Original Salary).

Front

If a laptop is sold for $1200 after a 20% markup, how do you find the original price?

Back

Original Price = Selling Price / (1 + Markup Percentage). For a 20% markup, Original Price = 1200 / 1.2 = $1000.

Front

What is the percent proportion formula?

Back

The percent proportion formula is: Part/Whole = Percent/100.

Front

How do you find the percent increase?

Back

Percent Increase = [(New Value - Original Value) / Original Value] × 100.

Front

What is 10% of 500?

Back

10% of 500 is calculated as 500 × 0.10 = 50.

Front

What does it mean if something is marked down by 30%?

Back

A 30% markdown means the price is reduced by 30% of its original price.

Front

How do you convert a fraction to a percent?

Back

To convert a fraction to a percent, divide the numerator by the denominator and multiply by 100.

Front

What is 15 is what percent of 75?

Back

15 is 20% of 75.