Percentage Growth / Decline Calculator
Calculate the percentage increase or decrease between two values.
How to use this calculator
Enter the Initial Value (the earlier or baseline number) and the New Value (the more recent number), then click Calculate Change. The result shows the percentage increase or decrease between the two, using the formula ((New − Old) / |Old|) × 100. This works for any comparison where you need a percentage change — year-over-year (YoY) revenue growth, month-over-month (MoM) traffic, or the change in any other metric over time.
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