How about 85 percent ?
NK survives or crashes with or without China.
NK is flatlined just above full crash out mode now. Hard to put them much lower. All they have going for them is to have a war with the south, and us.
Too many things going on the the world right now for the place to remain relatively at rest. Worse, we have the biggest jackass in charge of a military since Hitler took control over the German military. Glad I am not serving in Korea these days as our jerk in charge would not know what to do if the NORKS invaded the south.
I don't think any of us know the exact percentage. I agree that Kim knows that China watches his every move very closely and yanks him in every now and then. Still, this might be the time to swat this fly as China is in no position to help, which is why I doubt that what he's doing is sanctioned by China.