It might help if you rewrite this fraction so that each coefficient or variable is in its own fraction:
With the numbers fraction we just reduce like you've done many times before. With the variables, we use the rule for exponents when dividing: Subtract the exponents:
which simplifies to:
This may be an acceptable form the for the answer. But we could...
Multiply it all back together:
Or...
Eliminate the negative exponent...
... and then multiply it all back together: