Answer:
[tex]\frac{1}{2}[/tex]
Step-by-step explanation:
We are given that an expression
[tex]\frac{1}{2}a-\frac{1}{2}[/tex]
We have to find out the factor of coefficient of the variable.
In order to find out the factor we will factorize the each term in the given expression
[tex]\frac{1}{2}a-\frac{1}{2}[/tex]
[tex]\frac{1}{2}\times a-\frac{1}{2}[/tex]
[tex]\frac{1}{2}(a-1)[/tex]
Hence, factor of coefficient of variable is [tex]\frac{1}{2}[/tex]