Don't eat a full meal on an empty stomach, it will make you fatter.
It's absolutely no problem to lose 20 pounds a semester. It is no exaggeration to say that it can be reduced by half. But you must understand that losing weight can't be achieved in a short time, just can't take it to heart. Let it develop naturally.
PS: The most ruthless way is to go to the countryside and take it to the countryside for a month or two. ...