If g (x)= x 2/3 then g (x)= 2 over 3 (2/3) x -1/3

OK OK I get it. (How to solve by using the power rule.)

What I don't get is how do you reduce 2/3 by 1 to get -1/3.

I know this sounds kinda stupid, but can somebody please break this down step by step on how to reduce this fraction by 1 before I go crazy!