Percentage Calculator
Quickly compute percentages, percent increases/decreases, and ratios for business or school.
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Percentage calculations are essential for tracking growth, calculating taxes, and managing retail discounts. Ensure you use the correct 'Original' value as the base for accurate percentage change results.
How to use
- 1
Select the mode you need: 'A% of B', 'A is what % of B', or '% Change'.
- 2
Enter your first value (A) in the top input field.
- 3
Enter your second value (B) or the original value in the next field.
- 4
The result updates instantly as you type, showing the calculated percentage or difference.
Formula
The basic formula for 'A% of B' is: For '% Change' from Old to New:
Frequently asked questions
What is the difference between a percentage increase and a percentage decrease?
A percentage increase happens when the new value is higher than the original (positive change), while a decrease happens when the new value is lower (negative change). The formula remains the same, but the result shows whether it's a gain or a loss.
How do I calculate a discount using this tool?
To find a 20% discount on a 100₮ item, use the 'A% of B' mode. Enter 20 as A and 100 as B. The result (20₮) is the amount you save. Subtract that from the original price to find your final cost (80₮).
Why is my percentage change showing as a large number?
Percentage change measures the relative difference. If an original value is very small and the new value is much larger (e.g., from 1 to 10), the percentage increase will be 900%.