Percentage formulas, made explicit.
Use the noun beside each number to identify the correct denominator.
More PercentDock tools
See the percentage, not just the number.
Calculate percent of a number, ratios, and percentage change with visible formulas.
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Percentage of a number, without guesswork.
Calculate any percentage of a number with a visible formula.
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Percent of
Twenty percent of 80 is 0.20 × 80 = 16.
Percent change
A move from 80 to 100 is a 25% increase because the difference, 20, is divided by the starting value, 80.
Percentage points
A rate moving from 20% to 25% rises by 5 percentage points but increases by 25% relative to its original rate.
PercentDock
Work out shares, changes, markups, and reverse percentages.