This is a funny one – in the strictest terms, use "fewer" when you can count something, use “less” when you can’t count something. However, descriptive grammarians – who look at how language is actually used – point out that this rule doesn’t correctly describe the most common usage of today or the past. For consistency however, it’s best to stick to the following rules:
- Use fewer when you can count something, for example, the committee wants to have fewer meetings next year
- Use less when you can’t count something, for example, voters are calling for less bureaucracy
- The same goes for percentages – Less than 30% of the internet cares (you can’t count ‘internets’) and Fewer than 30% of readers care (because you can count readers)
- Never use no less than with numbers – always say no fewer than, for example, He exceeded the speed limit on no fewer than 12 occasions
- Use less for ages, heights and weights, for example, Tom Thumb was less than 3ft tall; the man is less than 30 years old; she weighs less than seven stone
Don’t use forward slashes in titles or headings. Try to replace them with 'and' / 'or'.
Make sure that when you do use them, there’s a space on both sides of the slash. For example, ‘see policy on office maintenance / repairs.’ This helps copy to remain ‘dynamic’ – that is, it responds to the size of the screen the user is viewing the website on.
Should be used at the end of proper sentences but not with titles.
For use of full stops with lists, see Bulleted lists and Numbered lists.