Choose the calculation mode: 'What is X% of Y?', 'X is what % of Y?', or 'Percentage increase/decrease'.
Enter your numeric values into the corresponding input fields.
Click 'Calculate' to see the exact percentage and calculation breakdown.
Use the clear or reset button to start a new percentage calculation.
Key Features & Benefits
Three essential percentage calculation modes in one easy interface.
Clear visual indicators for positive gains and negative decreases.
High-precision calculations with clean decimal formatting.
Ideal for discounts, tax calculations, tips, test scores, and financial analysis.
Frequently Asked Questions
How is percentage increase or decrease calculated?
Percentage change is calculated using the formula: ((New Value - Original Value) / Original Value) * 100. A positive result indicates growth, while a negative result represents a reduction.
Can this calculator handle negative numbers and decimals?
Yes. You can enter negative values, fractional percentages (like 0.75%), and large numbers without precision errors.
How do I calculate a retail discount percentage?
Use the third mode: enter the original price and the sale price to find the exact discount percentage, or use mode 1 to calculate how much you save from an advertised percentage.