Calculated Field on Report

[SFCMatthews]

I have a report I am trying to build; I need it to give me the percentage for the number of employees in a company that has completed training “A” Along with the names of those who attended the training. It should also show any other training the company has completed.
tblCompany; CompanyID
tblemploy; employID, CompanyID
tbltrainingroster; rosterID, employed
tblLane; rosterID, laneID
tbltasktrainingjoin; laneID, taskID, joinID
tbltask; taskID,

 

[SFCMatthews]

Ok I figured out one problem; I add a join table between tblemploy and tblTrainingRoster.
But I still need help with the form.