This property defaults to 1 so that the value is used as is when being converted to a string. If the StringFormat was set to P0, a percent format which means the value is multiplied by 100, and the values being used were in the range 0-100 then one might set this to 0.01.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2