minus 3 Kg and 3 cm

So my dietitian tells me that I am doing quite well with my program to lose weight. It all started in June when someone at the office spoke of this great doctor who helped a lot of people with their diet. I was around 83 Kg then and was not happy, I did not overeat but simply leading a sedentary life does it to you.

So she explained that it is all mathematical and a question of approach, she's a German doctor. The diet she gave me was and remains quite reasonable and it is all foods I eat anyway, so there was no abrupt changes. It helps also in Italy that we have little to no pre-prepared or processed foods and frozen foods remains limited on the market, can goods are also fairly limited.
When I first met her I was around 80 kg, and now I am at 76.5 Kg and have lost 3 cm on my waist, I need to loose another 4 Kg and if I can loose also another 4 cm on my waist that would be great according to the Dr. Lattermann.

One kilo = 2.2 Lbs. So I lost 3kg or 6.6 lbs.
In centimeters 3 cm = 1.18 inches

So I need to loose another 4 kg or 8.8 lbs and 4 cm or 1.57 inches. I really think I can do it and do not see that goal as impossible. In fact I am quite motivated.