Question 65395
(3x^3yz^-1)/(-12xy^-2z^2)
Reduce the coefficients:  -1/4
Reduce the x-factors   : x^2
Reduce the y-factors   : y^3
Reduce the z-factors   : 1/z^3
Multiply the results:
= (-1/4)x^2y^3/z^3
=[-x^2y^3]/[4z^3]
Cheers,
Stan H.