% Percentage Calculator
Solve any percentage problem: find a percent of a number, percent change, or what percentage one number is of another.
What is X% of Y?
%
Result
0
X is what % of Y?
Percentage
0%
Percentage Change (Increase / Decrease)
Percentage Change
0%
Absolute Change
0
Direction
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X is Y% of what number?
%
Total Number
0
Percentage Formulas
What is P% of N? → Result = N × P / 100
X is what % of Y? → Result = X / Y × 100
% Change: from A to B → Change = (B − A) / A × 100
X is P% of what? → Total = X / P × 100
X is what % of Y? → Result = X / Y × 100
% Change: from A to B → Change = (B − A) / A × 100
X is P% of what? → Total = X / P × 100
Common Percentage Uses
- Discounts: "30% off $85" → save $25.50, pay $59.50
- Tips: "15% of $47 bill" → $7.05 tip
- Tax: "$500 item + 8.5% tax" → $42.50 tax, $542.50 total
- Grade: "36 out of 45 correct" → 80%
- Investment return: "$10,000 → $12,500" → 25% gain
What's the difference between percentage points and percent change? +
Percentage points measure the arithmetic difference between two percentages (e.g., rates rising from 2% to 5% is a 3 percentage point increase). Percent change measures the relative change (e.g., that same move is a 150% increase in the rate itself). This distinction is crucial in finance and economics reporting.
How do you add percentages? +
You generally cannot simply add percentages unless they are percentages of the same base. A 10% increase followed by a 10% decrease does not return to the original value — the result is a 1% net decrease. Always apply percentages to the current value sequentially.