We use the quantifierslessandfewerto talk about quantities, amounts and degree.Lessandfewerare comparative words.
Lessis the comparative form oflittle.Feweris the comparative form offew.
Lessandfewerwith a noun
We usually uselesswith uncountable nouns. We usefewerwith plural nouns:
I doless workat weekends than I used to.
Better cycle routes would meanfewer carsandfewer accidents.
You will often hearlessused with plural countable nouns in informal spoken situations, but traditionally it is not considered to be correct:
We’ve gotlesspizzas than we need. There’s ten people and only eight pizzas.(traditionally correct usage: fewer pizzas)
Lessandfewerwithof
When we usefewerorlessbefore articles (a/an, the), demonstratives (this, that), possessives (my, your) or pronouns (him, them), we need to useof. We useless ofwith singular nouns andfewer ofwith plural nouns:
It was funny to begin with, but as time went on, it becameless of a joke.
In ten years’ time, more and more people will be demanding information twenty-four hours a day, from all parts of the world.Fewer of themwill be getting that information from newspapers which arrive hours after the news has occurred.
Lessandfewerwithout a noun
We can leave out the noun when it is obvious:
Every year in Britain about 5,000 people die on the roads.Fewerare killed at work.(fewer people)
See also:
Moreorless
Little,a little,few,a few
Least,the least,at least