Assuming that you mean "simplified form", we have to cancel every common divisor of both numerator and denumerator.
36 is factored as [tex]2^2\cdot 3^2[/tex]
34 is factored as [tex]2\cdot 17[/tex]
So, the two numbers only have a factor 2 in common, meaning that the simplified form of this fraction is
[tex]-\dfrac{18}{17}[/tex]
