Probably more than you want to, in all the wrong places, and you could do harm to your bodily systems. Fasting causes many unwanted changes, including reduction in metabolic rate, which is something you don't want if you are trying to lose weight. It is better to eat sensibly, satisfying your need for energy and protein while avoiding 'excess calories' from too many sugars and fats. You weight loss on any diet would depend on a lot of variables, such as how much you weigh, how tall you are, what is your metabolism like. However, I would like to point out something very important. If you stop eating for a long time, your body interprets this as being a time where food is hard to find. Hence, it will put itself into survival mode, which means it will take as many calories as it can from any food ingested. Consequently, when you start eating again, you will put back on the weight you lost and then some. Your body will just think "Oh food! Better be prepared for next time I don't have some!" This will eventually lead to weight gain. Thus, if the goal is weight loss, an healthy alimentation (less sugar, whole grains, lots of fruits and veggies and some proteins to keep you full) and some exercising will be more profitable in the long run.
Español: reducir grasa sin hacer ejercicio, Français: maigrir sans faire de l'exercice, 中文: 在不锻炼的条件下减肥, Русский: похудеть без тренировок, Deutsch: Abnehmen ohne Sport, Italiano: Ridurre il Grasso Senza Fare Attività Fisica, Português: Emagrecer Sem se Exercitar, Nederlands: Afvallen zonder aan sport te doen, العربية: تقليل الدهون بدون ممارسة الرياضة /injects>