if I weighed 160 and had no fat at all to speak of or as little as possable and put 160 in its sayd I had like 30 witch isnt true right? my scale has censor pads, I just used it and it says right now im at 7% I used to be one of those health freaks, I got so crazy about it I lost 12 pounds in a week, but was miserable and had to stop and put it back on. what would 20bmi equal out to bf %?