Work is shown in hours but you can add the Percent Allocation field to the detailed (right hand side) of the view. That will show you the percent of maximum units the resource is working. It will show in percentages.

Hello JulieS, it seems to work, but not completely: infact, the method indicates the hours and the percent allocation of each task that composes a subproject, it also shows the total hours of the subproject, but not the overall percent allocation of the subproject. It 's strange!!!