There is no single, universally agreed percentage because:
Most rigorous studies place the prevalence of problematic gaming / Gaming Disorder between 0.3% and 3% of all players. Broader "at-risk" categories sometimes reach 5–10%, but these include heavy engagement without functional impairment.
If gaming is harming daily life, seek help from a mental-health professional or organizations like Game Quitters or On-Line Gamers Anonymous.