Trump has created 515 businesses and only 11 of them failed. That's a 98.64% success rate. He has a better track record than Elon Musk by an order of magnitude.
Ah, now nwalker85's comment makes more sense although it is patently false. A more accurate assessment is that Trump has been associated with 515 business entities. The vast majority of those entities are shell corporations or LLCs meant to (as the name implies) limit liability.
How many of those are real businesses? If all the company does is hold a single asset, such as a private plane, or only has other Trump org companies as customers then it isn't a real business. I'll bet most of those companies exist solely to limit liability or for tax reasons.