I do not know an exact percentage, but I can tell you that whether or not you gain weight after liposuction is entirely up to you. If you maintain a healthy diet and lifestyle, there is no reason that you would gain weight after liposuction; conversely, if you lead an unhealthy lifestyle, you may end up gaining weight. It is not uncommon to gain a few pounds immediately following liposuction due to swelling, water retention, and lack of exercise, but this is not significant weight gain and usually drops off after a few weeks. It is important to remember that liposuction is not a weight loss tool, but rather a way to contour the body into a more aesthetically pleasing shape. Liposuction will not help you to lose a significant amount of weight.