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Step-by-step guides on percentages, formulas, and everyday calculations.

Guides

How to Calculate VAT
Add VAT to a price, remove it, or find the VAT amount for any rate. Includes UK 20%, EU rates, and worked examples.
How to Calculate a Tip
Find the tip amount for any bill. Includes common tip percentages, mental shortcuts, and how to split the bill.
Percentage Increase Explained
What percentage increase means, the formula, worked examples, and the difference between increase and percentage points.
What is 20% of a Number?
How to find 20% of any number instantly — with a formula, examples, and a free calculator.
What is a Good Discount Percentage?
How retailers set discounts, what makes a deal genuinely good, and how to calculate your real saving.
Percentage Formula in Excel
How to calculate percentages in Excel. Covers percentage of a number, percentage change, and formatting tips.
Percentage vs Percentage Points
The difference between a percentage change and a percentage point change — and why it matters.