Most people who are losing weight and on a diet and exercise can expect to lose between 1 to 2 lbs of weight per week.
That 1 to 2 lbs of weight per week equals about 4 to 8 lbs of weight per month which is the safest amount of weight to lose in one months time.
Trying to lose more than 8 lbs of weight per month can be dangerous to your health and 8 lbs of weight maximum per month is a healthy amount of weight to lose per month.
So if you lose 8 lbs of weight per month that means that you could lose 96 lbs of weight per year which is a healthy goal.
When I went on a diet, exercised and did fasting I lost 100 lbs in a years time which was good.
So I lost a bit over 8 lbs of weight per month but trying to lose anymore than that can be unhealthy.