VOXI - Density model

I am doing a 3D inversion of gravity data using Voxi. The input grid is the residual anomaly, and I have used for the Bouguer correction and topography correction a density of 2.67 g/cm3.
My question is regarding the output model. The density values of the output model, are they relative to the background density? for instance, a value of 0.2 means 2.67 + 0.2 g/cm3?
thank you very much for your help.

With regards,