Question: is 80/20 ground beef the same as ground chuck?
Answer: That refers to the makeup of the meat, not its nutritional content, Underly told us "80/20" means a breakdown of 80 percent lean beef to 20 percent fat, typically ground chuck. "85/15" is 85 percent lean and 15 percent fat (ground round) and "90/10" is 90 percent lean and 10 percent fat (ground sirloin).