Get the reciprocal of the second term and multiply
Since there are common terms between the two parts u can cross muliply (cross out common factors with the numerator of one side with the denomiator of the other)
Lets take the first part to cross muliply and ignore the rest... The 10 and 6 can be divided by 2.. the "z5" is subtracted with the "z3" to get "z2" in the numerator. The "y2" has no common factor so it stays the same.
Now lets take the second part and ignore the first because its finished.
.... There is not common factors so...
Hope that helped=)