Calculate the percentage increase or decrease from one value to another.
Frequently Asked Questions
Percentage change = ((New Value - Old Value) / |Old Value|) × 100. A positive result is an increase; a negative result is a decrease.
((75 - 50) / 50) × 100 = 50%. This is a 50% increase.
Yes. A negative percentage change indicates a decrease. For example, going from 100 to 80 is a -20% change.
Percentage change from zero is undefined (division by zero). If the old value is 0 and the new value is not 0, the change is mathematically infinite.
Percentage change has a direction (from old to new), while percentage difference is typically the absolute difference divided by the average of both values.