Contact

Email is the only channel, and it reaches a person rather than a queue.

hello@percentageguru.com

Especially welcome

• Corrections. A wrong figure, an out-of-date VAT rate, or an explanation that does not hold up. These get fixed first.
• A calculation that behaved oddly. Tell us the numbers and the mode — or just paste the URL, which carries them.
• Accessibility problems. If something is unusable with a screen reader, a keyboard, or at high zoom, that is a defect.
• Teachers. If the GCSE worksheet would be more useful in another format, say so.

There is no contact form, because a form needs a server and this site does not have one. That is also why nothing you type into a calculator can ever reach us.