# Math Help - how to diffrentiate a fraction?

1. ## how to diffrentiate a fraction?

HIya, hopinf you could help me with this question:
find f'(x) for
f(x)= (x-3) / (x^2/3x)

Im a bit stuck because i was taught that i had to convert back into surds form before i diffrentiate, but i dont know how to convert it.

thanks!

2. That's ugly notation, perhaps you may clarify it a bit?