Answer
$b^{m-n}$;
SUBTRACT.
Work Step by Step
This problem tests your understanding of the Quotient rule.
According to the Quotient rule, when dividing exponential expressions with the same nonzero base, you should subtract the exponent in the denominator from the exponent in the numerator. Use this result as the exponent of the common base.
For example, $\frac{3^3}{3^2}=3^{3-2}=3^1=3$
