Percentage Change Calculator
Quickly calculate the percentage change between an old value and a new value. This tool determines whether the change is an increase or decrease, shows the absolute difference, and computes the exact percentage change.
Percentage change measures how much a quantity has increased or decreased relative to its original value. The formula is: Percentage Change = ((New Value - Old Value) / |Old Value|) x 100. A positive result indicates an increase, while a negative result indicates a decrease.
This calculation is widely used in finance to track stock price movements, revenue growth, and inflation rates. In science, it measures changes in experimental results. In everyday life, it helps compare prices, weights, and other measurable quantities over time.
For example, if a product's price goes from $50 to $65, the percentage change is ((65 - 50) / 50) x 100 = 30% increase. If the price drops from $65 to $50, the change is ((50 - 65) / 65) x 100 = -23.08% decrease. Note that percentage change is not symmetric: a 30% increase followed by a 23.08% decrease returns to the original value.