[hennell]

I always found it weird when helping people with excel formulas how few people even try to check maths they don't understand, let alone try to understand it.

I struggle to remember even relatively simple maths like working out "what percentage of X is Y" so if I write a formula like that I'll put in some simple values like 12 and 6 or 10,000 and 2,456 just to confirm I haven't got the values backwards or something. I've been shown sheets where someone put a formula in that they don't understand, checked it with numbers they can't easily eyeball and just assumed it was right as it's roughly in their ball park / they had no idea what the end result should be.

Then again I've also seen sheets where a 10% discount column always had a larger number than the standard price so even obviously wrong things aren't always checked.