Universal Calculator
TAIIR

Percentage Calculator

Calculate percentages instantly with precision. Find percent of a number, percentage change, increase, decrease, and difference.

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Mastering Percentages: The Complete Guide

Percentages are everywhere—discounts, taxes, interest rates, statistics, and performance metrics. This Percentage Calculator provides four essential tools: find a percentage of a number, calculate percentage change (increase/decrease), determine percentage difference between two values, and find what percentage one number is of another. Whether you're shopping, analyzing business data, or doing homework, this calculator delivers accurate, instant results with clear explanations.

Core Percentage Formulas

  • X% of Y: (X / 100) × Y
  • Percentage Change: ((New - Old) / |Old|) × 100
  • Percentage Difference: (|A - B| / ((A + B) / 2)) × 100
  • A is what % of B: (A / B) × 100

Percentage Change vs. Percentage Difference

Percentage change measures how much a value has increased or decreased relative to its original value—ideal for tracking growth over time. Percentage difference compares two independent values relative to their average, useful for comparing two measurements or experimental results. Use the appropriate tab for your scenario.

💡 Practical Use Cases

  • Shopping: Calculate 20% off a $50 item = $40 final price.
  • Finance: $1,000 investment grows to $1,200 = 20% return.
  • Grades: 45 correct out of 60 questions = 75%.
  • Business: Revenue increased from $1M to $1.5M = 50% growth.

Frequently Asked Questions

How do I calculate what percentage one number is of another?

Divide the part by the whole and multiply by 100. Example: 30 is what % of 150? (30/150)×100 = 20%.

What is the difference between percentage change and difference?

Change compares new vs. old baseline. Difference compares two values relative to their average.

How do I calculate a percentage increase?

((New - Old) / |Old|) × 100. Example: $80 → $100 = 25% increase.

Can percentages be greater than 100%?

Yes. A value doubling becomes 200% of the original, representing a 100% increase.

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