If the data date is earlier than the BL Start, the Schedule % Complete is 0. If the data date is later than the BL Finish, the Schedule % Complete is 100. The Schedule % Complete indicates how much of the activity duration should be currently completed, relative to the selected baseline
The Baseline that is used in this calculation is defined by accessing Enterprise, Projects and clicking on the Settings tab in the Project Details.
Schedule % Complete = (Current DD - BL Start) / BL Duration
What is the Formula to Calculate Schedule Percent Complete in Primavera P6?
The Schedule % Complete in Primavera P6 specifies how much of the activity's baseline duration has been completed so far. Computed based on where the current data date falls between the activity's baseline start and finish dates.