(8)/(z)-(4)/(z) Simplify your answer as much as possible. square

Combine the fractions since they have the same denominator:<br /><br />\[<br />\frac{8}{z} - \frac{4}{z} = \frac{8 - 4}{z} = \frac{4}{z}.<br />\]<br /><br />Final answer: <br />\[<br />\boxed{\frac{4}{z}}<br />\]