There is some disparity between a couple of resources over whether the damping value on the Dynamic analysis UI is supposed to be input as a whole number (percentage) or a decimal (ie, 3 or 0.03 for 3 percent). The discussions I found here in the archives don't seem to address this directly. The PTC KB indicates it is a percentage...a trusted resource has heard decimal.
Thanks in advance,
Gavin B. Rumble, PE Solid Engineering 336-224-2312