I'm 16 with 92kg weight.how to reduce it?

Aerobic exercise: Unless you are very tall and heavily-muscled, this is more than you need. Forget dieting and counting calories -- nobody likes doing this or focuses on this for long. You want to embrace an athletic activity that you enjoy and that involves serious aerobic exercise. Your brain will regain a sense of healthy eating, your fitness friends will guide you, and things will solve themselves.