Do you need to calculate percentages quickly? A percentage calculator is a simple tool that helps you find percentages of numbers, increases, decreases, and more. Whether you’re a student, business owner, or shopper, percentages are everywhere!
About Our Percentage Calculator
Our free online percentage calculator helps you solve common percentage problems quickly and accurately. Whether you’re calculating discounts, tips, tax rates, or academic grades, this tool provides instant results with clear explanations.
What Can You Calculate?
- X% of Y – Find what X percent is of a given number Y
- X is what percent of Y – Determine the percentage that X represents of Y
- Percentage increase – Calculate the percentage growth from an initial to a final value
- Percentage decrease – Find the percentage reduction between two numbers
Common Percentage Calculations
Percentages are used in everyday life for various purposes:
- Calculating sales tax or VAT on purchases
- Determining restaurant tips (typically 15-20%)
- Figuring out discounts during sales (e.g., 30% off)
- Calculating interest rates on loans or savings
- Analyzing statistical data and growth metrics
- Grading systems in education
How to Use This Calculator
Simply select the type of percentage calculation you need from the tabs above, enter your numbers in the appropriate fields, and click “Calculate” to get instant results. Each calculation includes the mathematical formula used, helping you understand how the result was derived.
What is a Percentage?
A percentage is a number or ratio expressed as a fraction of 100. The symbol for percentage is %. For example:
• 50% means 50 out of 100
• 25% means 25 out of 100
Percentages are used in:
✔ Discounts & sales
✔ Grades & exams
✔ Finance & interest rates
✔ Statistics & data analysis
Also use :-Scientific Calculator
How to Calculate Percentages (Simple Formulas)
- Basic Percentage Formula
To find X% of a number (Y), use:
Percentage Value=(X100)×YPercentage Value=(100X)×Y
Example: What is 20% of 500?
(20100)×500=0.2×500=100(10020)×500=0.2×500=100 - Percentage Increase/Decrease
To find a percentage increase or decrease:
Percentage Change=(New Value – Old ValueOld Value)×100Percentage Change=(Old ValueNew Value – Old Value)×100
Example: If a price rises from 50to50to70, what’s the % increase?
(70−5050)×100=40%(5070−50)×100=40% - Find Original Number After Percentage Change
If a number increases by X%, the original number is:
Original Number=Final Number1+(X100)Original Number=1+(100X)Final Number
Example: After a 25% increase, a number is 125. What was the original?
1251.25=1001.25125=100
Why Use a Percentage Calculator?
Calculating percentages manually can be tricky. A percentage calculator makes it easy by:
🔹 Giving instant results
🔹 Reducing math errors
🔹 Handling complex calculations (like compound percentages)
🔹 Saving time & effort
Common Uses of a Percentage Calculator:
✅ Shopping Discounts – Calculate sale prices
✅ Tax & Tips – Find how much to add to a bill
✅ Grades & Scores – Check exam percentages
✅ Business & Finance – Track profit/loss percentages
FAQs About Percentage Calculator
Q1. How do I calculate 10% of a number?
Divide the number by 10 (e.g., 10% of 200 = 20).
Q2. How do I add 15% to a price?
Multiply the price by 1.15 (e.g., 100+15100+15115).
Q3. How to find percentage between two numbers?
Use: (PartWhole)×100(WholePart)×100