Instantly calculate percentage increase, decrease, difference, and more. Perfect for students, teachers, and professionals needing quick, accurate results.
Select from six different percentage calculation methods based on your needs
Input your numbers in the appropriate fields and click calculate
View your answer immediately with step-by-step calculation details
| Calculation Type | Formula | Example |
|---|---|---|
| What is X% of Y? | (X ÷ 100) × Y | 25% of 80 = 20 |
| X is what % of Y? | (X ÷ Y) × 100 | 30 of 120 = 25% |
| X is Y% of what? | X ÷ (Y ÷ 100) | 40 is 20% of 200 |
| Percentage Change | ((New - Old) ÷ Old) × 100 | $50 to $60 = 20% increase |
A percentage is a way to express a number as a fraction of 100. It's commonly used to compare values, show proportions, and describe increases or decreases. For example, 25% means 25 out of every 100, or one quarter.
To find a percentage of a number, multiply the number by the percentage (as a decimal). For example, 20% of 50 is 0.2 × 50 = 10. Our calculator does this instantly for you!
Divide the first number by the second, then multiply by 100. For example, to find what percent 30 is of 120: (30 ÷ 120) × 100 = 25%.
Subtract the old value from the new value, divide by the old value, then multiply by 100. For example, if a price goes from $40 to $50: ((50 - 40) ÷ 40) × 100 = 25% increase.
Percentages make it easy to compare values, understand discounts, track progress, and communicate data clearly in everyday life, business, and education.
What our users say about our Percentage Calculator
Based on 27 reviews from satisfied users
@jessicasmith
"This percentage calculator is a lifesaver for my daily work! It's fast, accurate, and super easy to use. I love how I can quickly calculate discounts and markups for my business."
@rahulkumar
"Perfect for students! I use it to check my exam scores and calculate grade percentages. The interface is clean and the results are instant. Highly recommended for anyone who needs quick percentage calculations."
@annamueller
"I use this tool for shopping and budgeting all the time. It makes calculating sale prices and tax so simple. The step-by-step breakdown is really helpful. Thank you for this free tool!"
Percentages are everywhere in our daily lives—from shopping discounts and exam scores to financial reports and statistics. But what exactly is a percentage? Simply put, a percentage is a way to express a part of a whole as a fraction of 100. The word itself comes from the Latin "per centum," meaning "by the hundred." So, when you see 45%, it means 45 out of 100.
Calculating percentages is easy once you know the basic formula:
Percentage (%) = (Part / Whole) × 100
For example, if you scored 18 out of 20 on a test, your percentage is (18 ÷ 20) × 100 = 90%.
Percentages help us compare values, understand proportions, and make sense of data. Whether you're calculating a tip, analyzing business growth, or checking your progress toward a goal, percentages make the math simple and relatable.
(P ÷ 100) × X(X ÷ Y) × 100((New - Old) ÷ Old) × 100(|V1 - V2| ÷ ((V1 + V2)/2)) × 100Our Percentage Calculator is designed for everyone—students, teachers, business owners, and anyone who needs quick, accurate percentage calculations. With a user-friendly interface and instant results, you can solve all your percentage problems in seconds. No more manual math or confusion—just clear answers, every time.
Try it now and make percentage calculations a breeze!