The easiest method to burn 70 lbs in three months is through following a raw veggies diet and simultaneously do 2 more steps. Drink lots of water with lemon if you want to lower your weight with 70 lbs in three months, since this will boost metabolic process and clean your body of fats.br br The past may be exercising. You will need to exercise at least 5 times for more than 45 minutes to be losing 70 lbs in three months.