Goodliffe's Theorem

Goodliffe's Theorem predicts an inverse correlation between an individual's understanding of percentages, and the likelihood that they use the % button on a calculator.

Anyone with a thorough understanding of percentages is highly unlikely to use the % button on a calculator compared to someone with only a limited understanding of percentages.

Megan: Hey Phil, I'm trying to work out a percentage thingy, do you reckon Noel would show me how to use the % button on my calculator?

Phil: Are you cray cray?! Noel falls towards the extreme right of the Goodliffe's Theorem Curve - he'd just laugh at your stupidity. Try asking Matt.