Shedding extra weight is a very gradual process. You should have strong determination and patience if you want to lose weight. And it cannot happen suddenly. You have to follow a strict diet and exercise schedule.
Regarding diet - have small multiple meals like 4-5 instead of 3 big meals; eat food rich in proteins and fibres like egg white, boiled chicken, vegetables, fruits, pulses; avoid carbohydrate rich foods like rice curds oily foods sweets ghee and other junk food. Regarding exercises - start slowly with brisk walking, then change over to jogging, running and other abdominal exercises. Never over strain yourself. And always keep yourself well hydrated and enjoy whatever you do. Also consult a dietician at any hospital. He will be able to give you a proper chart regarding the same