6th Grade: Percents

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 convert a decimal to a percent?

Back

To convert a decimal to a percent, multiply the decimal by 100 and add a percent sign. For example, 0.14 becomes 14%.

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 15% of $12,800, calculate $12,800 x 0.15 = $1,920.

Front

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

Back

The formula is: Original Price = Sale Price / (1 - Discount Rate). For example, if a ticket costs $6.65 after a 20% discount, the original price is $6.65 / (1 - 0.20) = $8.31.

Front

How do you find what number a percentage represents?

Back

To find what number a percentage represents, divide the part by the percentage (in decimal form). For example, if 16 is 25% of a number, the number is 16 / 0.25 = 64.

Front

What is 20% of 50?

Back

20% of 50 is calculated as 50 x 0.20 = 10.

Front

How do you express a fraction as a percent?

Back

To express a fraction as a percent, divide the numerator by the denominator and multiply by 100. For example, 1/4 = 0.25 = 25%.

Front

What is the relationship between fractions, decimals, and percents?

Back

Fractions, decimals, and percents are different ways to represent the same value. For example, 1/2 = 0.5 = 50%.

Front

How do you increase a number by a percentage?

Back

To increase a number by a percentage, multiply the number by the percentage (in decimal form) and add it to the original number. For example, to increase 100 by 20%, calculate 100 + (100 x 0.20) = 120.

Front

How do you decrease a number by a percentage?

Back

To decrease a number by a percentage, multiply the number by the percentage (in decimal form) and subtract it from the original number. For example, to decrease 100 by 20%, calculate 100 - (100 x 0.20) = 80.