Free Online Percentage Calculators

Frequently Asked Questions (FAQ)

1. What is a percentage?

A percentage is a way of expressing a number as a fraction of 100. It is denoted using the '%' symbol. For example, 45% means 45 out of 100 or 0.45 in decimal form.

2. How do I calculate a percentage of a number?

To calculate a percentage of a number, multiply the number by the percentage and then divide by 100. For example, to find 20% of 150, you would calculate (150 * 20) / 100 = 30.

3. What is the difference between percentage increase and percentage decrease?

Percentage increase is the percentage by which a value has grown from its original amount, while percentage decrease is the percentage by which a value has diminished. The formula for percentage increase is ((New Value - Original Value) / Original Value) * 100, and for percentage decrease, it's ((Original Value - New Value) / Original Value) * 100.

4. How do I determine what percentage one number is of another?

To find what percentage one number is of another, divide the first number (part) by the second number (whole) and then multiply by 100. For example, to find what percentage 30 is of 150, calculate (30 / 150) * 100 = 20%.

5. Can these calculators handle decimal values?

Yes, the calculators can handle decimal values. Just ensure that the input fields are set to accept decimal numbers (using the 'step="any"' attribute in the input fields).