Percentage Calculator
Calculate percentages, increases, decreases, discounts, and more with our comprehensive percentage calculator tools.
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Common Percentage Equivalents
Understanding Percentages
What is a Percentage?
A percentage is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign "%".
Basic Formula
Percentage = (Part / Whole) × 100. This formula is used to find what percent one number is of another.
Real-World Applications
Percentages are used in discounts, interest rates, statistics, grades, and many everyday calculations.
Percentage Calculator FAQs
How do I calculate percentage?
To calculate what percent one number is of another, use the formula: (Part / Whole) × 100. For example, to find what percent 25 is of 100: (25/100) × 100 = 25%.
How do I calculate percentage increase?
Percentage increase = [(New Value - Original Value) / Original Value] × 100. For example, if a price increases from $100 to $120, the increase is [(120-100)/100] × 100 = 20%.
How do I calculate percentage decrease?
Percentage decrease = [(Original Value - New Value) / Original Value] × 100. For example, if a price decreases from $100 to $80, the decrease is [(100-80)/100] × 100 = 20%.
What's the difference between percentage points and percent?
Percentage points refer to the absolute difference between two percentages, while percent change refers to the relative difference. For example, going from 10% to 15% is a 5 percentage point increase or a 50% increase.
How do I add or subtract percentages?
To add a percentage, multiply by (1 + percentage/100). To subtract a percentage, multiply by (1 - percentage/100). For example, to add 20% to 100: 100 × (1 + 20/100) = 120.