Blog
Guides and articles
Longer pieces on topics that don't fit on a calculator's result card.
Guide · basicsPercentage calculator: learn to work out discounts and increases easilyAll the basic formulas, mental-maths tricks and the five most common mistakes – with examples.
Guide · businessHow to work out VAT and the net price in reverseWhy you don't subtract 20% straight from the price, and how to do the reverse VAT calculation correctly.
Coming up
We publish guides when there's a real need for them – not to fill a schedule. In the works are, among others, the combined effect of margin and a discount, percentage points in the news, and the percentage views of an Excel pivot with images. Requests are welcome via the contact page.