weight 173 lb BF% 40.9 Water% 42.0 LBM% 55.7%
so BF = 40.9/100x173=70.8lb LBM = weight=BF =173-70.8 = 102.2lb
but LBM = 55.7/100x173=96.3lb a difference of 5.9lb.
I believe the LBM% figure is more accurate but off the top of head I cant remember the reason for the discrepancy, its something to do with the way body fat is measured using electrical current I think.
UPDATE: Just dug out the manual. It doesn't say how the LBM% is calculated I will ask at t4h pharmacy when Igo past.
NB: Having now read the manual (i'm not a manual reader) I have just discovered there are 2 results screens & that the second screed gives BMI & TDEE based on activity level. It also has a normal/athlete mode. So thanks for making me read the manual!