Percent Proportion

Front

What is Percent Proportion?

Back

Percent proportion is a way to express a number as a fraction of 100. It is often used to compare a part 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 20% of 75, calculate 75 * 0.20 = 15.

Front

What is the formula to find the whole when given a part and a percentage?

Back

The formula is: Whole = Part / (Percentage in decimal form). For example, if 34% of a number is 51, the whole is 51 / 0.34 = 150.

Front

How do you convert a percentage to a decimal?

Back

To convert a percentage to a decimal, divide the percentage by 100. For example, 82% as a decimal is 82 / 100 = 0.82.

Front

What is 15% of 200?

Back

30

Front

What percent of 120 is 36?

Back

30%.

Front

What is the relationship between fractions and percentages?

Back

A percentage is a fraction with a denominator of 100. For example, 25% is equivalent to 25/100.

Front

How do you find the percentage increase?

Back

To find the percentage increase, subtract the original value from the new value, divide by the original value, and multiply by 100. Formula: ((New Value - Original Value) / Original Value) * 100.

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: ((Original Value - New Value) / Original Value) * 100.

Front

What is a common mistake when calculating percentages?

Back

A common mistake is not converting the percentage to a decimal before performing calculations.