My recomendation would be yes calories
in should be less than calorie output. Eat more fruits and vegetables because they fill you up by consuming much less quatanties of food. Make sure you eat sufficient protein also 12-20% of your daily intake. With cooking be sure to eat Unsaturated fats which include Olive oil, canola oil, peanut oil, safflower, soybean, sunflower, corn oil, or flaxseed oil. When using a butter spread avoid butter and all other hydrogenated/Saturated fats.