Calculate percentages, compare values, and find percentage increase or decrease.
The Numelios Percentage Calculator helps solve common percentage problems, including finding a percentage of a number, determining what percentage one value is of another, and measuring percentage increase or decrease.
Percentage calculations are widely used in finance, discounts, taxes, interest, investments, price changes, grades, statistics, and everyday comparisons.
To calculate a percentage of a value, convert the percentage to a decimal and multiply it by the number.
For example, 20% of 500 is:
Percentage calculations can also be reversed to determine what percentage one value represents of another.
To determine what percentage one number represents of another, divide the first value by the second and multiply the result by 100.
For example, if 50 is part of a total of 200:
Percentage increase measures how much a value has grown relative to its original amount.
If a price rises from $100 to $120, the increase is $20, which is 20% of the original $100 value.
Percentage decrease measures how much a value has fallen compared with its original amount.
For example, a reduction from $200 to $150 represents a decrease of $50, or 25% of the original value.
Percentages are commonly used to calculate discounts, markups, taxes, tips, and price changes.
Interest rates, APRs, investment returns, and savings growth are generally expressed as percentages.
Percentage increase and decrease can be used to compare changes in revenue, costs, population, or other values.
Percentages are often used to express test scores, completion rates, and other performance measures.
Percentage calculations are especially useful when working with interest rates and investment returns. The Interest Calculator can help estimate interest on a principal balance.
For long-term growth scenarios involving compounding, use the Compound Interest Calculator . The Investment Calculator can also help estimate growth based on an assumed percentage return.
Multiply the number by the percentage and divide by 100. For example, 25% of 80 is 80 × 25 ÷ 100 = 20.
Divide the part by the whole and multiply by 100.
Subtract the original value from the new value, divide the difference by the original value, and multiply by 100.
Subtract the new value from the original value, divide that difference by the original value, and multiply by 100.
Yes. A percentage can exceed 100% when the value being compared is greater than the reference value.
This calculator is provided for informational and educational purposes only. Results are mathematical estimates based on the values entered.