how to decrease breast?
It is true that losing weight may decrease your breast size, but the way that it works is by losing weight all over your body. It is not possible to ONLY lose weight in your breast area. I think and recommend that all people have a well balanced diet that follows the food pyramid and get regular exercise. I would not recommend starting a diet without the assistance of your doctor.
Also, there are no particular exercises that will help you lose weight in your breasts, but regular exercise will tone your entire body.
So to answer your question, there is no miracle way to decrease your breasts (without surgery)
you can either lose a lot of weight
get breast reduction surgery
both of them have risks. Choose wisely.