What part of speech is “fewer”
Adjective
Definition:
fewer is an adjective used to describe a number, quantity or amount being less than a defined amount or number.
Examples:
Fiona has fewer carrots than Jill.
There were fewer attendees at the event.
Tips:
it must be paired with 'than' in order to determine the comparison; 'fewer attendees at event' does not have enough detail in order to provide context.