It has the numerator (number on top) being less than the denominator (number on bottom) so that means it is a proper fraction.
BUT WAIT!
A mixed fraction usually is a proper fraction as well! How do we know the difference?
A mixed fraction is written as (this is an example) .
Notice that number dangling to the left? That is why it is known as a mixed fraction because it involved multiplication (the 2) and division (5 and the 8).