How to lose 100lbs in 5 months?

i am 5ft 4in and weigh 218lbs, average weight for my height is about 120. Is it possible to lose about 100lbs in 5 months? I have been working out for about three weeks now three days a week and I have started eating healthy, in this time i have lost about 7lbs, so is there a way that I can lose faster? Please help :) I am ready to be healthy and I am open to anything that doesn't involve dieting supplements.
How to lose 100lbs in 5 months?
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