Ekuation

Percentage Calculator

A versatile percentage calculator that can handle common percentage calculations, percentage changes, and differences between numbers. Perfect for financial calculations, statistics, and everyday math.

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Enter the percentage value (e.g., 25 for 25%)

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Enter the number to calculate percentage of

About this calculator:

This calculator provides various percentage calculations commonly used in mathematics, finance, and everyday situations:

  • Common percentage phrases and calculations
  • Simple percentage calculations
  • Percentage increase and decrease
  • Percentage difference between two values

Results

25% of 100 is:

Result

25.00

25%
25% of 100 = 25

Formula

(25 ÷ 100) × 100
Understanding Percentages
A percentage represents a part of a whole, expressed as a number out of 100.

Basic Concepts

  • 100% represents the whole or total amount
  • 50% is half of the total
  • 25% is one quarter of the total
  • 1% is one hundredth of the total

Common Calculations

  • Percentage of a number: Multiply the number by the percentage (as a decimal)
    Example: 25% of 80 = 80 × 0.25 = 20
  • Percentage one number is of another: Divide the first number by the second and multiply by 100
    Example: 20 is what % of 80? = (20 ÷ 80) × 100 = 25%
  • Finding the original number: Divide the final number by the percentage (as a decimal)
    Example: 20 is 25% of what number? = 20 ÷ 0.25 = 80
Real-World Applications
Percentages are used in many everyday situations.
  • Discounts and sales (e.g., 20% off)
  • Interest rates on loans and savings
  • Tax calculations
  • Academic grades
  • Statistics and data analysis
  • Business metrics and growth rates
Tips for Working with Percentages
  • Convert percentages to decimals by dividing by 100 (e.g., 25% = 0.25)
  • To find an increase, add 100% to the percentage (e.g., 20% increase = 120%)
  • To find a decrease, subtract the percentage from 100% (e.g., 20% decrease = 80%)
  • Remember that percent change can be greater than 100% for increases
  • Percentage points and percentages are different (especially in finance)

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