[tex]\huge\boxed{\text{rational}}[/tex]
[tex]0.28[/tex] is a rational number because it has a known end in its decimal form.
An example of an irrational number would be [tex]74.9\overline{3}[/tex]. This number does not have a defined end. It goes [tex]74.933333333333...[/tex] and never ends, making it irrational.