How Vision Calculates Overall Percent Completes
In calculating the overall percent complete for a project, Vision uses all the record-level percent complete figures unless you specify overrides.
Vision displays the overall percent complete in the Budget Summary dialog box. This figure is a weighted average percent complete, calculated in this way:
(All Percent Completes * Their Budgets) / Total Project Budget
All percent completes also include a percent complete for overhead, which is equal to the weighted average percent complete for labor.