Formula to figuring out how much excess weight I've lost...

Wondering if someone could give me the formula to how much excess weight I've lost. I'm feeling a little down right now & think looking at what I've lost so far that way will cheer me up. Last week was horrible & its nobody's fault but my own. All week we had people at my work bringing in food & snacks for everyone every day except Wed when we had a pot luck. I did not eat wisely all week when I was at work lets just say & now I'm feeling terrible about it. I did however try the Syntrax Matrix Mint cookie sample on Friday & liked it as well as the Cookies & Creme one too, so I ordered some of both of those. I know I'm eating too many carbs I have to be even tho they are whole grain or beans & cheese, I think I'm eating too much of those that its not working with my surgery. I'm not sure. I'm just rambling. Just been feeling like a loser all week & I have no one to blame but myself. I know I'm stronger than that, giving in to temptation.

Body Percentage Lost Calculation: highest weight minus current weight equals weight lost times 100 divided by highest weight equals percentage

My Example: 331 minus 131 equals 200 times 100 equals 20000 divided by 331 equals 60.42296 (60.42%)

Thanks! I'm at 31.42 % at 9.5 months out, is that good or where I should be? I only have 50 lbs to meet my goal of 165, it's just moving sooo slow now. It scares me.

The above formula gives you body percentage lost, not excess weight lost

You have lost 2/3 or 66.6% of your excess weight (150 to lose - 100 lost so far = 50 to go!) if I remember your figures correctly!