For mulberry it varies enormously from “nearly impossible” (e.g., pretty much any nigra) to “one of the easiest things in the world to root”. You can check the list linked in this first post to see what your chances are for particular cultivars:
You will not succeed with persimmon, just get a bundle of seedlings from Missouri Dept of Conservation and graft instead.
I don’t know about pears, but I’m pretty sure those are also almost always grafted. Probably a reason for that?