Percentage Calculator
Use our free Percentage Calculator to quickly solve common percentage problems like X% of Y, X is what percent of Y, and percentage increase/decrease. Perfect for sales tax (VAT/GST), discounts, salary changes, grades, and everyday calculations anywhere in the world.
Calculate Percentages Instantly
Percentage Results
Tip: Use this calculator for sales tax (VAT/GST), discounts, profit margin checks, and salary change calculations.
How Percentage Calculations Work
Percentages make it easy to compare values and understand changes. Whether you’re calculating a discount, sales tax (VAT/GST), grades, or a salary hike, these formulas help you get accurate answers in seconds.
Common Percentage Formulas
- What is X% of Y? Result = (X/100) × Y
- X is what % of Y? Result = (X ÷ Y) × 100
- Percentage change = ((New − Old) ÷ Old) × 100
Why This Helps (Real-life)
- Shopping: Verify discount % and final prices
- Taxes: Estimate sales tax (VAT/GST) quickly
- Salary: Understand hike %, CTC changes, or cuts
- Education: Calculate marks percentage and improvement
Percentage Calculator Examples
Example 1: What is 18% of 1,000?
Result = (18/100) × 1,000 = 180
Example 2: 50 is what % of 200?
Result = (50 ÷ 200) × 100 = 25%
Example 3: Salary increases from 40,000 to 50,000
Change = ((50,000 − 40,000) ÷ 40,000) × 100 = 25% increase
Quick Answers
What is a percentage?
A percentage is a number expressed as a fraction of 100. For example, 25% means 25 per 100, or one-quarter.
How do I find X% of a number?
Multiply the number by X and divide by 100. Example: 20% of 500 = (20 × 500) ÷ 100 = 100.
How do I find what percent X is of Y?
Divide X by Y and multiply by 100. Example: 50 is what percent of 200? (50 ÷ 200) × 100 = 25%.
How do I calculate percentage increase or decrease?
Change % = ((New value − Old value) ÷ Old value) × 100. Positive result is increase; negative is decrease.
How do I add or remove a percentage (e.g. GST or discount)?
To add: New value = Original × (1 + rate ÷ 100). To remove from a value that includes it: Original = Value ÷ (1 + rate ÷ 100).
Frequently Asked Questions
How do I calculate percentage of a number?
Use: (Percentage ÷ 100) × Number. Example: 10% of 500 is (10/100) × 500 = 50.
How do I find what percent X is of Y?
Use: (X ÷ Y) × 100. Example: 50 is what percent of 200? (50/200)×100 = 25%.
How do I calculate percentage increase or decrease?
Use: ((New − Old) ÷ Old) × 100. If the result is positive, it’s an increase; if negative, it’s a decrease.
Can percentage be more than 100%?
Yes. If the part is bigger than the whole (or the new value is much higher than the old value), the percentage can exceed 100%.
What is the easiest way to calculate sales tax (VAT/GST)?
Use the “What is X% of Y?” mode. Example: 18% sales tax on 1,000 is 180. For the final price, add it to the base amount.
How do I calculate discount percentage from marked price?
Use percentage change or “X is what % of Y?” depending on what you have. Discount % = ((Marked − Selling) ÷ Marked) × 100.