How often to breast cancer patients have a lumpectomy & gone on to live a life, cancer free?

Much more often.... ...Than not. Thankfully, our tools for treating breast cancer have improved quite a bit over the past 20 years. Survival is not related to method of surgical rx (lumpectomy vs. Mastectomy); rather, it is dependent on the stage, type, and molecular features of the cancer. When caught very early, the chance for cure is better-than 90%. The best way to do that is yearly mammograms beginning at 40.
Most of the time. Every breast cancer is different, however if a lumpectomy done for an early stage cancer, typically followed by breast radiation, the prognosis is generally good and most patients will go on to live a normal healthy life.