Left panel: stellar-to-total enclosed mass profiles for massive disc galaxies in the EAGLE (blue) and IllustrisTNG (orange) simulations, compared with the data from SPARC (red). The solid lines show the median profiles, while the shaded areas represent the scatter given by the difference between the 84th and the 16th percentiles. Individual measurements for SPARC spirals are shown as red triangles. Right panel: as in the left panel, but the radii are normalised to the effective radius R_eff of each galaxy.