How many calories, how much fat?
Your best bet is to combine a slightly lower calorie intake with regular exercise. If you drastically cut down on what you’re eating or start exercising huge amounts your metabolism will just adjust and you will have to continue doing what you’re doing indefinitely or end up gaining back more weight than you lost. If you’re patient and want to lose weight, try cutting about 250 calories a day from your normal diet (that’s like 4-5 oreos for instance, so skip dessert or whatever) and try to burn about 250 calories a day through exercise. As a result, you’d be cutting out 3500 calories per week and losing on average a pound of fat a week. Oh, in answer to the first part, your body gets the energy it needs to keep your lungs/heart/stomach etc. working by “burning” the calories contained in food. That (the amount you metabolize) combined with whatever you burn by walking around the house etc. constitutes the 2000 calories you asked about.
