Pants sizes

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Okay I honestly need help with this. I currently weight 211 and wear a lose size 16 in pants. I really want to be able to wear my 11/12 or 13/14 from high school in 8 weeks so I can bring more jeans when I move back to college for the year. I was wondering if it is possible to lose 2 pants sizes in 8 weeks and how so? Please Thanks in advance :)