Articles
These five articles use the same formulas as the live calculators. They are not financial advice.
How to Calculate a Percentage of a Number
Parts per hundred, decimals, values below 1% and above 100%. Use the percentage calculator.
How to Calculate Percentage Increase and Decrease
Why the original is the denominator, and why the reverse trip is a different rate. Use the change calculator.
How to Calculate Discounts and Final Prices
Sequential discounts and tax after discounts. Use the discount calculator.
How Reverse Percentages Work
Divide by the forward multiplier. Use the reverse calculator.
Percentage Change vs Percentage Difference
Directional versus symmetric comparisons. Use the difference calculator.