Sajani give you exact answer already but i am adding a little with that answer. Remember one thing your extra weight mean you are carrying extra fat. So you have to burn extra fat from your body and you can gain to lose wait.
So My 1 suggestion burn your extra calories even your total calories which you take everyday.
Suppose today you will take 200 calories food. Then prepare to burn atleast 220 or 250 calories.
I hope it will help you.