PokerTracker

Is it possible to show the percentage number after for example the note donks flop with top pair or better?
If it is where can i find this filter?

No that is not possible, because we don't (and can't) know how many times that player had top pair or better, did something else, then folded (or donked, then folded).

You can find the donkbet flop filter in Actions & Opportunities -> Flop -> Bets and the various hand strength filters in Hand Values -> Made Hands.

but you can say how often he went to showdown after donking with top pair or better(for example 20times) and how often he went to showdown after donking with less than top pair(for example 5 times) and put this into relation.

in note tracker the absolute number after the note would be 20 in this example but the percental number would be 80%. I think this would be possible to create and gives you a better idea of the tendencies of the player. Or is there a mistake in my thoughts??

It's not possible with NoteTracker as it is built now. It may be possible someday but I can't say if or when that would be.