Improper fraction
In an improper fraction, the nominator is greater than the denominator.
Explanation
The fraction therefore has a value greater than 1. So the value is an improper fraction.
Example 1
The number 2.5 can be written as an improper fraction
but also as a mixed faction
Example 2
Fermions are particles with half-integer spin, which you usually write as 1/2, 3/2, 5/2.