title: Weighted percentages by group in Crystal Reports
body: <p>I'm stumped on the following as I'm trying to display an accurate weighted percentage in group footer using the following formula which seems to work for the grand total only:</p>
  
  <p>((Sum(ProductionCost)-Sum(ActualCost)) / Sum(ProductionCost)) * 100</p>
  
  <p>Is there a way on each group footer section to indicate this formula to work within current group at least so I don't have to tediously do different formulas for every possible group?</p>