Get the displayed data from a Table Visual

I have this Power BI Table visual, and some slicers that help me filter the data.

I need to add an extra column that makes a division on Ingresos/CostoCalculado. This values are from separated tables however, related by a Many to Many relationship as shown below.

I can't do a common division obviously, since the the relationship won't allow me to do so. So I think it would be way easy to just get the value displayed in the visual from the column "Margen" and divide it for the "Ingreso" one. This way the slicers would work normally and the aggrupation of months (that's done in the visual itself and not the SQL tables) wouldn't be affected.

Someone has an idea on how to do this?