Percentage Calculator
All-in-one percentage calculator. Quick, accurate, instant results.
Percentage Calculator | How to Calculate Percentages, Discounts, and Increases
A percentage calculator is a simple but powerful tool used to find percentage values, percentage increase or decrease, and discounts. It helps you answer questions like what is 20 percent of 50, 45 is what percent of 60, or how much is a 15 percent discount on 120 dollars. Our free online Percentage Calculator supports all common percentage operations including percent of, percent difference, and percent change. You can use it to calculate sale prices, interest changes, tips, growth rates, and more. It works instantly, is mobile friendly, and provides clear step by step results for every calculation.
How to Use the Percentage Calculator:
The calculator can solve several percentage problems:
Find a percent of a number: Enter 25 percent of 80 to get 20.
Find what percent one number is of another: Enter 45 and 60 to get 75 percent.
Find percentage increase or decrease: Enter an old value and a new value to see the percent change.
For example, if your salary increases from 2500 to 2750, the calculator shows a 10 percent increase. If a price drops from 200 to 150, it shows a 25 percent decrease. You can also reverse the process to find the original value before a discount. For instance, if an item costs 85 after a 15 percent discount, the calculator shows that the original price was 100.
Percentage Formulas Explained:
The basic formula for percentage is:
Percentage = (Part ÷ Whole) × 100.
For increases and decreases:
New Value = Original × (1 ± Rate ÷ 100).
Examples:
20 percent of 50 → (20 ÷ 100) × 50 = 10
Increase of 10 percent on 200 → 200 × 1.10 = 220
Decrease of 25 percent on 80 → 80 × 0.75 = 60
These formulas are used in finance, education, and business to compare values and measure growth or reduction accurately.
Common Uses of Percentages:
Percentages appear in daily life and business:
Shopping: Calculate discounts, sale prices, and tips
Finance: Track interest rate changes and investment growth
Education: Convert exam scores into grades
Business: Measure revenue growth and profit margins
With this calculator you can easily handle all these situations without doing manual math.
Why Use This Percentage Calculator:
Our Percentage Calculator provides quick and accurate results for percent of numbers, percentage change, discounts, and reverse calculations. It supports decimals and commas and updates in real time. Whether you are a student or professional, it saves time and improves accuracy.
Frequently Asked Questions
- What is 10 percent of 200?
- 10 percent of 200 is 20. Multiply 200 by 0.10 to find the result.
- How do I calculate percentage difference?
- Subtract the smaller number from the larger one, divide by the average of both numbers, and multiply by 100.
- What is the formula for percentage change?
- Percentage change equals the new value minus the old value, divided by the old value, multiplied by 100.
Calculate percentages, discounts, or increases instantly with our free Percentage Calculator. Try more math tools like the Basic Calculator, Fraction Calculator, or Loan Calculator to explore related topics.
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