What percentage of tlime will a prisoner have to serve on a felony charge in california state prison?

There is no way of answering this question. Felony sentences are commensurate with the TYPE of felony offense you committed. A violent offense against a person will invariably have a more lengthy sentence attached to it, than a non-violent offense against property might. What the perpetrators past criminal record (if any) may be also comes into play as well.