Percentages

Front

What is a percentage?

Back

A percentage is a way of expressing a number as a fraction of 100. It is often used to compare proportions.

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 200, calculate 200 x 0.15 = 30.

Front

What does it mean to find 'what percent' of a number?

Back

Finding 'what percent' of a number means determining what fraction of that number corresponds to a given value. For example, to find what percent 15 is of 75, use the formula (part/whole) x 100.

Front

How do you convert a fraction to a percentage?

Back

To convert a fraction to a percentage, divide the numerator by the denominator and then multiply by 100. For example, 1/4 = (1 ÷ 4) x 100 = 25%.

Front

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

Back

The formula is: Whole = Part / (Percentage in decimal form). For example, if 6.5 is 25% of a number, the whole is 6.5 / 0.25 = 26.

Front

How do you find the tip amount from a bill?

Back

To find the tip amount, multiply the total bill by the tip percentage (in decimal form). For example, for a $25 bill with a 15% tip, calculate 25 x 0.15 = 3.75.

Front

What is 7% of 9?

Back

To find 7% of 9, calculate 9 x 0.07 = 0.63.

Front

How do you express a number as a percentage of another number?

Back

To express a number as a percentage of another number, use the formula: (Part/Whole) x 100. For example, to express 30 as a percentage of 15, calculate (30/15) x 100 = 200%.

Front

What is the relationship between percentages and fractions?

Back

Percentages are a specific type of fraction where the denominator is always 100. For example, 25% is equivalent to 25/100.

Front

How do you find the percentage increase or decrease?

Back

To find the percentage increase or decrease, use the formula: ((New Value - Old Value) / Old Value) x 100.