Ratio between the dark matter fraction at R_e, disk calculated from the circular velocity and from the 3D spherical enclosed mass, , versus bulge-to-disk ratio B/T, for a range of different disk intrinsic axis ratios (colored lines, from q_0, disk = 0.01 to 1) for an example massive galaxy at z = 2. The ratio between the two dark matter fraction measurements is lower for lower B/T (i.e., higher disk contributions) and lower q_0, disk (i.e., more flattened disks), with for low values of both q_0, disk and B/T. The limiting case of a Freeman (infinitely thin) exponential disk has . As B/T increases for fixed q_0, disk, and likewise for increasing q_0, disk at fixed B/T, the ratio of the two fraction measurements approaches 1 because the composite system becomes more spherical. Overall, the discrepancy between the f_DM estimators measured at the same radius is relatively minor.