The Percentage Change Calculator quantifies how much one value changes relative to another. It expresses the result as a percent increase or decrease from the initial value. For example, going from 5 books to 10 books represents a 100% increase. Conversely, going from 10 books to 5 represents a 50% decrease.
Use the percent change calculator when you have an initial (old) value and a final (new) value. Positive results indicate a percent increase; negative results indicate a percent decrease. Below the calculator you will find additional information. See all my Statistical Calculators!
Percentage Change Calculator
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