Dashes are customarily used for ranges. 500-600 wpm; 35-75 Kph; 2-3 grams. While a / can be used for words "and/or", using it with numbers leads to confusion with fractions: 2/3.
> 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.
I realise 500/600 looks like 5/6, but 500,600 reads to me as 500600. Maybe | is a good unambiguous character to use for "or".