Percentage Calculator
Find a Percentage of a Number
The most common calculation: determine the value of a given percentage of a number. For example, calculate a 15% discount from an amount of 2,000. Formula: Result = Number × Percentage / 100.
What Percentage One Number Is of Another
Determine what percentage one number represents of another For example, what percentage is 45 of 180? Formula: Percentage = (Number A / Number B) × 100.
Add a Percentage to a Number
Used to increase a number by a given percentage - For example, calculate a price including markup or VAT. Formula: Result = Number + (Number × Percentage / 100).
Subtract a Percentage from a Number
Useful for calculating the discounted price of a product. Formula: Result = Number − (Number × Percentage / 100).
How Much Greater One Number Is Than Another
Shows by what percentage the first number exceeds the second. The second number is treated as the base (100%). Formula: Percentage = (A − B) / B × 100.
How Much Smaller One Number Is Than Another
Shows by what percentage the first number is smaller than the second. The second number is treated as the base (100%). Formula: Percentage = (B − A) / B × 100.
Find the Whole (100%)
Used when a part of a number is known as a percentage and you need to find the original (whole) value. For example, if 30% of an amount equals 600, what is the total amount? Formula: 100% = Part / Percentage × 100.
Calculate Percentage Change
Helps determine by what percentage a value has changed from the original number to the new one-whether it increased or decreased. A positive result indicates an increase, while a negative result indicates a decrease. Formula: Change = (New − Original) / Original × 100.
Comments
The percentage calculator combines eight calculation operations in a single interface with tab switching. The tool finds the percentage of a number, determines the fraction of one number from another, adds or subtracts a percentage, calculates the difference between numbers as a percentage in both directions, restores the original number from a known fraction and percentage, and calculates the percentage change between the old and new values, indicating whether the change has increased or decreased.
The interface is organized into independent tabs, with each operation provided with a detailed description and a mathematical formula used by the tool for the calculation, along with an example.