How to Calculate Percentage – Step-by-Step Guide with Examples & Free Tool
Calculating percentages is a basic yet essential skill used in everyday life—whether you’re figuring out discounts, grades, tax, or profit margins.
In this guide, we’ll explain how to calculate percentages, walk through real-world examples, and introduce you to a free online percentage calculator.
✅ What is a Percentage?
A percentage represents a number out of 100. For example:
- 20% means 20 out of 100
- 75% means 75 out of 100

🧮 How to Calculate Percentage Manually
1. Find X% of a Number (Basic Formula)
Formula:
(Percentage ÷ 100) × Total
Example:
What is 20% of 150?
👉 (20 ÷ 100) × 150 = 30
2. Percentage Increase/Decrease
- Increase:
((New – Original) ÷ Original) × 100 - Decrease:
((Original – New) ÷ Original) × 100
🎯 Use Our Free Percentage Calculator
Try our online tool to calculate percentage automatically. No signup or download needed:
📊 Common Uses of Percentage:
- Shopping Discounts (e.g., 40% off)
- Tax Calculations (GST, VAT)
- Loan & Interest
- Grades and Exam Scores
- Profit & Loss in Business
🔁 Examples You Can Try:
| Scenario | Example |
|---|---|
| Find % of a number | What is 15% of 800? |
| Calculate discount | 25% off ₹1200 |
| Score to % | Scored 37 out of 50 |
| Price after % increase | Product price increased by 12% |
🙋♂️ Frequently Asked Questions (FAQ)
Q1. What is the easiest way to calculate percentage?
Use this formula: (Part ÷ Total) × 100
Q2. How do I calculate % increase?
Formula: ((New – Old) ÷ Old) × 100
Q3. Can I use this online?
Yes! Our free percentage calculator helps you get instant results.
🧠 Bonus Tip:
Bookmark the calculator page on your browser or mobile for quick access!
🔗 Related Tools:
Written by: Anjan Kumar
Founder of FixITtoolBox.com – Your go-to for smart online tools.
It’s onerous to seek out educated folks on this subject, but you sound like you already know what you’re speaking about! Thanks