math tool
Percentage Change Calculator
Calculate percentage increase or decrease between two numbers instantly.
Enter the original number and the updated number to see the percentage increase or decrease instantly.
resultlive
20%
percentage increase
difference
+20
formula
((new - old) / old) x 100
How it works
change formulaThis calculator compares a new number against an original number using the standard percentage-change formula: `((new - old) / old) x 100`. The result shows whether the change is an increase, a decrease, or no change at all.
Common uses
quick checksCompare price changes, discounts, and markup between two values.
Measure revenue, traffic, or growth trends across reporting periods.
Check increase or decrease percentages for scores, rates, and business metrics.