Isnt 83kg normal? U could build muscle and burn fat by doing so, or u just wanna shed the fat off? Well, if u re doing only cardio exercises, thsts pretty good, but u also could add some lifting exercises. If u dont plan to do with weights(not going to the gym) then u can do at home: bodyweight exercises, such as pushups, abs etc.
Or at park: bodyweight exercises such as pull ups, u can also use dumbbells/barbells if u have any at home, or buy.
Do ya hit da gym or naw?