Calculate percentages instantly: what is X% of Y, percentage change, and more.
A percentage is a dimensionless ratio expressed as a fraction of 100. It is the primary mathematical language for expressing relative change, probability, and distribution. Derived from the Latin per centum ("by the hundred"), percentages allow for the direct comparison of disparate data sets by normalizing them to a consistent scale.
While percentages are conceptually simple, their application in finance and science requires precise differentiation between three primary intents:
Formula: (P / 100) × V. Used for tax, tips, and chemical solutions.
Formula: ((New - Old) / Old) × 100. Calculating inflation, growth, or loss.
Formula: (Part / Total) × 100. Market share and population statistics.
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15% of 500
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