While you can change the percentage, I dont think its really best to change it too much. Obviously you could just go all in everytime and win much north of 90% but thats obviously not the best strategy. Also, never folding is going to make that number higher as well, but that is also not the best strategy.
Really you are looking at this all wrong, it doesnt matter how many hands you win, its how much you win. I know that you know this but every decision should be based on that and its easy to get away from that.
To be honest, instead of worrying about how to play AA, KK, AK type hands that are a majority of posts from newer players, go through some HA of other hands, or post some yourself. Playing AA, KK, AK well is not hard to do, so instead of focusing so hard on these hands, work on closing the other leaks in your game and find some new ways to win more/lose less with other hands. While these three hands are the winningest hands in everyones database (mostly everyone with enough hands), they are not what seperates good from bad players.
Please dont follow this with bad beat stories or how AK is a drawing hand, there are 8 million threads to do that in consisting of people who dont know what they are talking about.