Percentage Change
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Track Your Growth: The Percentage Change Calculator
Whether you’re monitoring a stock portfolio, calculating a seasonal discount, or tracking business growth, knowing the exact percentage difference between two numbers is essential. This Free Percentage Change Calculator provides instant results, showing you not just the numerical percentage but also clearly indicating if the change is an increase or a decrease.
Like all our tools, this calculator is unlimited, requires no sign-up, and features "smart rounding" for the cleanest possible display.
How Percentage Change is Calculated
Percentage change measures the relative difference between an old value and a new value. The mathematical formula used by this tool is:
Key Features:
- Automatic Direction Sensing: The tool detects if your result is a growth or a loss, highlighting increases in green and decreases in red.
- Absolute Accuracy: Handles negative numbers and decimals with ease, ensuring scientific and financial accuracy.
- Smart Formatting: If the result is a whole number like 50%, it shows "50%" instead of "50.000%," making it easy to copy and paste into reports.
- Zero-Barriers: Use it as many times as you need without ever hitting a paywall or login screen.
Practical Applications
- Finance & Investing: Calculate the "Return on Investment" (ROI) by comparing your initial purchase price to the current market value.
- Retail & Shopping: Determine the exact percentage you are saving during a sale by entering the original price and the sale price.
- Science & Data: Use it in lab reports to calculate "Percent Error" or the change in experimental variables over time.
- Fitness: Track your progress by calculating the percentage change in weight lifted or body measurements over several months.