Evaluate: (x^{-5})/(y^b)

Expression: $\frac{x^{-5}}{y^{b}}$

Apply exponent rule $a^{-b}=\frac{1}{a^b}$

$=\frac{\frac{1}{x^{5}}}{y^{b}}$

Apply the fraction rule $\frac{\frac{a}{b}}{c}=\frac{a}{b\cdot c}$

$=\frac{1}{x^{5}y^{b}}$