Approximately how many inches can I expect to lose off my waist?

I am 17, 5'7" and currently weigh 161.5lb. My measurements are 37"-30"-40". When I weighed 149.5lb my measurements were 35.5"-27.5"-38.5", but I gained a load of weight recently due to a lot of anxiety and depression, but I am getting help for that now, so I need to sort... show more I am 17, 5'7" and currently weigh 161.5lb. My measurements are 37"-30"-40".

When I weighed 149.5lb my measurements were 35.5"-27.5"-38.5", but I gained a load of weight recently due to a lot of anxiety and depression, but I am getting help for that now, so I need to sort out my body.

I am going on a diet eating 1400 calories a day, all from healthy food of course. Plus I will only be drinking water and tea.
I will also be working out, a lot of fast paced walking mainly about 5 days a week, then doing an hour of aerobic exercise 2 days a week.

My goal weight is 130lbs, so approximately how many inches do you think I could expect to lose off my waist, I need to get that nice thin waist again!

Thanks.
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