Percentage change shows how much a value moved relative to its original amount. It is useful for prices, traffic, sales, budgets, metrics, and year-over-year comparisons.
Subtract the original value from the new value, divide the result by the original value, and multiply by 100. A positive result means an increase. A negative result means a decrease.
If a value rises from 80 to 100, the difference is 20. Divide 20 by 80 to get 0.25, then multiply by 100. The percentage increase is 25%.
If a value drops from 200 to 150, the difference is -50. Divide -50 by 200 to get -0.25, then multiply by 100. The percentage change is -25%, which means a 25% decrease.
Use the Percentage Calculator if you want to skip manual steps. It helps with percentage share, percentage change, and related quick calculations.
Divide by the original value, not by the new value. The original value is the reference point for percentage change.
If the new value is larger than the original value, it is an increase. If it is smaller, it is a decrease.
The Percentage Calculator handles the math directly and is useful for repeated comparisons.