Stamatis
My understanding (which means I’m not sure but its what I always believed) is that there is no significance to the 100% value at all. ie “There is no datum implied or actual that is associated with the figure”
Whenever I asked Mr Pegasus Designer (who I got to know quite well) he said “We have a sender that pushes out a signal proportional to N1 which drives the cockpit gauge. We arrange via the associated gear ratios to make the thing read close to 100% at full throttle and accept that you will use the ACTUAL numbers we quote for the various limits.
Tattooed on the back of my left hand it says Max thrust 97, Normal Lift 100.5, Short lift dry 102.5, Short lift wet 107.
JF