Simplify (m^2-n^2)/(m^2n^2)*(mn)/1

$\frac{m^{2} - n^{2}}{m^{2} n^{2}} \cdot \frac{m n}{1}$

Since both terms are perfect squares, factor using the difference of squares formula, $a^{2} - b^{2} = (a + b) (a - b)$ where $a = m$ and $b = n$ .

$\frac{(m + n) (m - n)}{m^{2} n^{2}} \cdot \frac{m n}{1}$

Cancel the common factor of $m n$ .

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Factor $m n$ out of $m^{2} n^{2}$ .

$\frac{(m + n) (m - n)}{m n (m n)} \cdot \frac{m n}{1}$

Cancel the common factor.

$\frac{(m + n) (m - n)}{m n (m n)} \cdot \frac{m n}{1}$

Rewrite the expression.

$\frac{(m + n) (m - n)}{m n}$

Simplify (m^2-n^2)/(m^2n^2)*(mn)/1