> While a / can be used for words "and/or", using it with numbers leads to confusion with fractions: 2/3. As Y_Y already indicated: > I realise 500/600 looks

> While a / can be used for words "and/or", using it with numbers leads to confusion with fractions: 2/3. As Y_Y already indicated: > I realise 500/600 looks like 5/6 …. If we're going to fuss about typography, these things: > 500-600 wpm; 35-75 Kph; 2-3 grams. are hyphens, and you want an en-dash: 500–600 wpm instead of 500-600 wpm.