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Percentage Change Calculator — result sheet
Measure the increase or decrease from a positive starting value and compare the absolute change.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Percentage change = (new - original) / original * 100.
The original value is the reference denominator. A rise from 80 to 100 is 25%, whereas the reverse move is a 20% decrease because the reference changes. The absolute difference is shown separately from the relative percentage.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Original value — Must be positive; percentage change from zero is undefined.; minimum 1.0E-6; maximum 1000000000000
- New value — minimum -1000000000000; maximum 1000000000000
Worked example
| Input | Value |
|---|---|
| Original value | 80 |
| New value | 100 |
25%
Assumptions and limits
- The original value must be positive to avoid ambiguous negative-base growth conventions.
- A new value below zero is allowed and can produce a decrease greater than 100%.
- This is a single-period change, not an annualized growth rate.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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