That would be almost every prediction Q has made and certainly every one with a definite date (i.e. July 2018 "The world" would learn the truth)
We are still waiting for the first instance of "public reveal" which is what Q promised in one of the first posts - people indicted if not in handcuffs.
That's why some think Q has been over half disinformation so far.
But if you look at "predictions" per se, probably 90 percent disinfo, almost none have come to pass.