Yes
Say you gained some fat and bmi got into 30s and you wanna drop bmi back into low 20s but keep your muscle then u need 2 things, lots of meat and lifting weights at gym.
Arby's roast beef is cheap, high in protein, low in carbs. Eat one for lunch one for dinner and you're under 1500 cal/ day. 1 hrs on elliptical and 20 mins of heavy weights will get you a 2000 cal deficit daily which means in 30 days you'll net 60,000 calories or about 12 pounds of pure fat