Percentage Calculator

Multi-purpose percentage calculator: calculate what percentage $X$ is of $Y$, find $X%$ of $Y$, calculate percentage increase/decrease between two numbers, and solve reverse percentage problems.

Why Use This Tool?

• Financial & Sales Calculations: Calculate price markups, profit margins, sales tax, and discount reductions.
• Data Analysis & Growth Metrics: Measure month-over-month percentage growth in revenue or website traffic.
• Grade & Score Percentage: Calculate exam score percentages from total test points.

How to Use

1. Select calculation mode (e.g. "What is X% of Y?" or "Percentage Increase from X to Y").
2. Enter input values in the corresponding fields.
3. View calculated percentage result and step-by-step formula explanation.

Real Working Example

Input:

Calculation: Percentage Increase | Initial Value: $500 | Final Value: $650

Output Result:

Percentage Increase: +30.0% | Difference: +$150

Important Technical Details & Formulas

• Standard Percentage Formulas: `Change % = ((Final - Initial) / Initial) * 100` and `Value = (Percent / 100) * Total`.
• High Precision Output: Supports custom decimal rounding up to 6 decimal places.
• Client-Side Engine: Fast calculations in local browser memory.

Related Mathematics & Financial Tools

• Discount Calculator: Calculate sale discounts and savings.
• GST / Tax Calculator: Calculate sales tax and GST.
• ROI Calculator: Compute return on investment.