Percentage Calculator
Calculate percentages, increase, decrease, and percentage change.
What is X% of Y?
X is what % of Y?
Percentage Change
Increase by %
Decrease by %
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Continue with related pages to compare results and improve decision making.
How This Percentage Calculator Works
This percentage calculator finds X% of Y, what percent one value is of another, percentage change, and the result after increasing or decreasing a value by a percentage.
Formula and Calculation
The core formula used by this percentage calculator is: Percentage = (Part / Whole) x 100, and percent change = ((New - Old) / Old) x 100.
The calculator applies standard percentage math for value-of, increase, decrease, and change scenarios without manual formula juggling.
If sales increased from 80,000 to 96,000, the percent change calculator instantly reports a 20% increase and helps validate monthly performance targets.
How to Use This Calculator
- Choose the mode that matches your calculation type.
- Enter base and comparison values as required.
- Run the calculation to see percentage result.
- Use outputs for discounts, growth, score, or budgeting decisions.
Why Use This Percentage Calculator?
- Avoid manual percentage errors.
- Handle increase and decrease quickly.
- Use one tool for multiple percent scenarios.
- Speed up everyday finance and study tasks.
Related Tools and Guides
- Try the Discount Calculator for a related calculation.
- Try the Compound Interest Calculator for a related calculation.
- Read the Percentage Calculator Guide for examples and assumptions.
- Browse the Math Calculators page for more tools.