CalcHub
Percentage Calculator
Calculate percentages, percent of, and percent change between values.
X is what % of Y
X% of Y
Percent change
Part (X)
Whole (Y)
Enter part and whole values to see the percentage.
Percent change uses the first value as the base.
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Frequently Asked Questions
What is percent change based on?
Percent change is calculated as (new − old) ÷ old.
The first value is the base for the comparison.
Why is the percent different from the ratio?
Can I use negative numbers?