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 a percentage of a number?

Back

To calculate a percentage of a number, multiply the number by the percentage (in decimal form). For example, to find 30% of 50, calculate 50 x 0.30 = 15.

Front

What is 150% of $20?

Back

$30

Front

How do you find the original price if you know the sale price and the discount percentage?

Back

Use the formula: Original Price = Sale Price / (1 - Discount Percentage). For example, if the sale price is $21 and the discount is 30%, the original price is $21 / (1 - 0.30) = $30.

Front

What is 125% of 84?

Back

105

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 then multiply by 100. For example, to convert 14/20 to a percent, calculate (14 ÷ 20) x 100 = 70%.

Front

What is 40% of 200?

Back

80

Front

If a shirt costs $50 and is on sale for 20% off, how much do you pay?

Back

You pay $40. (20% of $50 is $10, so $50 - $10 = $40.)

Front

What is the percent increase if a price goes from $40 to $50?

Back

25%. (The increase is $10, and the percent increase is ($10 / $40) x 100 = 25%.)

Front

How do you find the percentage of a total?

Back

To find the percentage of a total, divide the part by the whole and multiply by 100. For example, if there are 80 girls out of 200 children, the percentage of girls is (80 / 200) x 100 = 40%.