Fraction (mathematics), a quotient of numbers, e.g. "¾"; or, more generally, an element of a quotient field

In common usage a fraction is any part of a unit. Fraction may also mean:

Fractional (ownership), a reference to property timeshare

Fraction (chemistry), a quantity of a substance collected by the separation process known as fractionation

Fraction (religion), the ceremonial act of breaking the bread during Christian Communion

In Human Resources, fraction can refer to the percentage of full-time a part-time employee works. So, for example, if an employee works 50% of the usual hours, their fraction is 50%. Positions which are filled by multiple employees at once can also be expressed by fractions > 100%. For example, if a position is budgeted as 150%, that means one 100% employee and one 50% employee can fill it at a time, or three 50% employees. In this sense, fraction is in units of full-time equivalent employees.

Fraction (politics), a parliamentary party

A faction – note spelling – is a splinter group or other smaller group within or previously associated with a larger group.

Fraction (comic), a short-lived comic about the theft of a powersuit