Percentages
Percentages, percentage change, discounts and how to avoid the usual mistakes.
- Guide · September 19, 2026How to Calculate a Discount and the Sale PriceFind the final price, the saving and the real percentage off, including stacked discounts that do not simply add up.
- Guide · September 19, 2026How to Calculate a PercentageEvery percentage problem is one of three questions. Here are the formulas, worked examples and a way to check your answer.
- Guide · September 19, 2026How to Calculate Percentage DecreasePercentage decrease compares a drop with the starting value. Learn the formula, the multiplier trick and how to reverse it.
- Guide · September 19, 2026How to Calculate Percentage IncreasePercentage increase compares a change with where you started. Here is the formula, examples and the reverse-calculation trap.
- Article · September 19, 2026Percent vs Percentage Points: What Is the Difference?One is a subtraction of two percentages, the other a comparison with the starting value. Mixing them up misleads readers.