Please refer to How do I share on Facebook for the steps sharing your results on Facebook, or other social media sites like Twitter, Instagram, Snapchat, WhatsApp, etc. You can also download the results as an image to your phone.
Mostly, people may not want to share their weight numbers to other people. Rather, they only want to share their weight loss numbers. For example, they want to told their friends that “I lost 10 pounds” without disclose their weights. To do so, during the steps given in How do I share on Facebook, at step (5) select “Comparison” on the top of the screen. Now you see differences of two selected data sets. Share now you only share the differences.