Fewer x Less: Como utilizar

Sign at the checkout of a supermarket: “Ten items or less”.

This is INCORRECT.

You can count the items, so you need to use the number word “fewer”. These nouns are countable.

* "Ten items or fewer."

This is CORRECT.

If you can’t count the substance, then you should use “less”. These nouns are uncountable.

* "You should eat less meat."

This is CORRECT.