Answer
$\displaystyle \frac{1}{5}\cdot x$
Work Step by Step
$\left[\begin{array}{ccccc}
\dfrac{1}{5} & \text{of}&\text{ a number } & & \\
\downarrow & \downarrow & \downarrow & \\
\dfrac{1}{5} & \times & x &
\end{array}\right]$
$\displaystyle \frac{1}{5}\cdot x$
