I follow a 50-30-20 myself, and I consider myself more active than average. I have recommended many people to dieticians and nutritionists though and have seen some wild ratios based on individuality. If you’ve never been to one of these professionals before, I highly encourage you to undergo the experience. You will quickly realize why I’m always saying “When it comes to a personalized diet, refer to a professional.” As for ‘Average Adults’ … there are none. But there are a plethora of unique individuals.