2.205 USAGE NOTE

'Any of' can refer to one or several people or things, or to part of something. Note that if it is the subject of a verb, when it refers several things, the verb is plural, and when it refers to a part of something, the verb is singular.

2.206

There are three comparative quantifiers, which can be used before noun groups. 'Less of' is usually used with singular noun groups and uncount noun groups, 'fewer of' is usually used with plural noun groups, and 'more of' is used with all three types of noun group.

Note that 'more of' is sometimes used in front of a noun group to intensify it.

Note also that 'less of' is sometimes used instead of 'fewer of', but many people think that this is not correct.