So there’s not a direct feature that you can see the percentage, at least I don’t think, but you are able to go into their likes column and see what posts they have liked. In their profile, you can go to the activities tab and go down to like. There it will show you what posts they have liked.
If you really do want to see the percentage, you can post in Marketplace and someone can make a plugin/theme for you (if you’re willing to pay for someone to do it.)