Percentage Calculator
Calculate percentage increase, decrease, and other common percentage problems
Calculation Options
Calculation Result
20
20% of 100 is
Calculation Type:
Percentage Of
Formula Used:
X% × Y
Calculation Details
Step-by-Step Calculation
| Step | Description | Calculation | Result |
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About Percentage Calculations
Percentages are a way to express a number as a fraction of 100. They are used in various contexts from calculating discounts to expressing changes and proportions.
Common Percentage Formulas:
What is X% of Y? → (X/100) × Y
X is what percent of Y? → (X/Y) × 100
Percentage change → [(New - Old)/Old] × 100
Increase X by Y% → X × (1 + Y/100)
Decrease X by Y% → X × (1 - Y/100)
Real-World Applications:
- Finance: Calculating interest rates, discounts, and investment returns
- Statistics: Expressing proportions and changes in data
- Business: Analyzing profit margins and growth rates
- Education: Grading systems and test scores
- Shopping: Calculating discounts and sales tax
Understanding percentages is essential for making informed decisions in everyday life and professional contexts.