You can see the results within 2 weeks. 0.5 to 1Kg per week is a good, healthy and sustainable weight loss. Losing 10% in a year is good enough. So if you are 90 Kgs then even if you lose 9 KGs per year it is good enough. Losing 2 to 3% per month should be maximum. So if you are 80 Kg then 1.5 to 3 Kg per month you can expect. Important thing is to develop healthy habits which lead to a healthy diet, lifestyle and weight loss.