$\"\"$

The expression is $\"\"$ .

Rewrite the expression in the fraction form as $\"\"$ .

A rational number can be expressed as a ratio $\"\"$ .

Here, $\"\"$ and $\"\"$ are integers and $\"\"$ is not zero.

Here $\"\"$ and $\"\"$ .

Therefore, the expression is rational number.

$\"\"$

The expression is rational number.