subsitute the most of ur carbs with fats (good ones espcially but bad fats works as well) but still you have to lower your total cals. the more cals that come from fat the better your burning fat process become. carbs glucose will be used for other energy needs instead of storing and muscular. the more fats you consume also would put you more in a ketogenic way. keto is the best for burnig fat process but ketones produce ketosis that could be fatal in just weeks of abscense of carbs. be careful.
poly fats: flax seed oil, sunflower seed oil, cotton seed oil, fish oil.
monosatured: olive, canola, etc.
the more you eat of this ones the better.