if you lose 10% of your body weight(10 lbs for every 100), you could cut your risk of disease, by alot...idk how much...
Losing 10% isnt really that hard...you could cut out small things and lose ten pounds...soda, fast food, etc...and make sure you eat breakfast, so you can keep your blood sugars stable...and exercise is a natural way to keep sugars low...depending on how old you are and how overweight you are, you can definitely control diabetes with diet and exercise. good luck