Percentage Calculator
What is
% of
?
Result: 100
What % is
of
?
Result: 25%
How Percentage Calculations Work
Calculate percentage increases, percentage decreases, fractional parts, and relative differences.
Calculation & Methodology
Percentage % = (Part / Whole) × 100 | Percentage Change % = ((New - Old) / Old) × 100
Calculate Discounts on Sales & Billing
Calculate retail markdowns and itemized billing discounts instantly.
Open Discount CalculatorFrequently Asked Questions
What is the formula for percentage increase?
Percentage Increase = ((New Value - Original Value) / Original Value) × 100.
How do you find what percentage X is of Y?
Divide X by Y, then multiply the resulting quotient by 100.