28.8 to 17% body fat

Too many varisbles involved to edtimate w/any accuracy how long that might take.

What you need to decide 1st is how much weight you want to lose or, in other words, what your goal wt at 17% BF will be.

If you indeed have 28.8% BF at 227, that equates to sbout 65# BF and 162# bone, muscle snd other tissue.

If your goal wt is 177# at 17% BF, wc would be a 50# wt loss, that would equate to 30# BF and 147# bone, muscle and othe tissue or a loss of 35# BF and 15# muscle (since the wt of bone, ligaments, tendons and other bofily tissue is relatively constant).

In order to achieve this, you would have to eat at a caloric deficit to lose the wt/fat and do some lifting and other exercise to build/preserve as much muscle in the process, given the understanding that it is almost inevirsble that you will lose some muscle mass as you lose wt.

How quckly you can achieve this depends on how much of a caloric deficit you choose, how disciplined you are in eating in accordance with that plan and how effective your lifting/exercise progrsm is in building/maintaining muscle and how well your dietsry plan suits that need and on how disciplined you are in carrying out your exercise and dietary program.

Only you can answer these questions but as a basis of comparison, it took me about 6 months to lose 40# from 200 to 160 and to drop my BF from around 25 to 15%, based on a reduction of caloric intake from 2000 to 1500 cal/day on a high protein diet while engaged in a progressive lifting program every other day but doing very little cardio in the procesd.

I have been maintaining my wt at or below 160 for the past 5 yrs and my BF, as meadured by DEXA and hydro, has been as low as 8% but has mostly been around 12%.OBTW, I'm 70 now and was 65 when I last started this process.

Of course, your experience will almost certainly vary

Good luck!