Percentage Calculator

Free percentage calculator with 3 modes: find a % of a number, calculate what % one number is of another, and find % change. Use our free calculator now.

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Result hesaplanacak
Explanation hesaplanacak

Three Percentage Calculations in One Tool

Percentages appear everywhere — discounts, tax, test scores, statistics. This calculator covers the three most common percentage problems with instant results.

Mode 1 – What Is X% of Y?

Use this to find a portion of a number. For example: What is 15% of 80?

Formula: Result = (X ÷ 100) × Y

Example: 15% of 80 = (15 ÷ 100) × 80 = 12

Mode 2 – X Is What % of Y?

Use this to find what fraction one number is of another. For example: 30 is what percent of 200?

Formula: Percentage = (X ÷ Y) × 100

Example: 30 is (30 ÷ 200) × 100 = 15% of 200

Mode 3 – Percentage Change

Use this to find how much a value increased or decreased between two points. For example: a price went from $50 to $65.

Formula: % Change = ((New − Old) ÷ Old) × 100

Example: ((65 − 50) ÷ 50) × 100 = +30% increase

Common Uses

  • Calculating discounts and sale prices
  • Finding tips and service charges
  • Tracking stock or investment returns
  • Grading tests and exams
  • Comparing growth rates

How to Use This Calculator

Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.

Frequently Asked Questions

QuestionAnswer
How accurate are the results?We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly.
Is this calculator free?Yes, completely free and no registration required.
What should I do for exact figures?For precise information, consult a relevant professional or official authority.
Does it work on mobile devices?Yes, it works seamlessly on all devices and screen sizes.

Important Notes

This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.

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Frequently Asked Questions

Divide X by Y and multiply by 100. For example, 25 is what percent of 200? → (25 ÷ 200) × 100 = 12.5%.
Subtract the old value from the new value, divide by the old value, then multiply by 100. Formula: ((New - Old) / Old) × 100.
"25% of 200" means 25/100 × 200 = 50. You multiply the percentage (as a decimal) by the total amount.