# Simplify (12a^-9b^-4)/(9a^2b^6)

Move to the denominator using the negative exponent rule .
Move to the denominator using the negative exponent rule .
Simplify the denominator.
Multiply by by adding the exponents.
Move .
Use the power rule to combine exponents.
Multiply by by adding the exponents.
Move .
Use the power rule to combine exponents.