Numerically, the decays of a 125 GeV Higgs boson in the Standard Model (which is a little below the experimentally measured value) are approximately as follows (updated per a PDG review paper with details of the calculations, for example, here and here):
A new paper from the CMS experiment at the Large Hadron Collider (LHC) detects a seventh Higgs boson decay channel predicted in the Standard Model, a decay to a Z boson and a photon, although not yet at the five sigma "discovery" level of significance.
The signal strength μ, defined as the product of the cross section and the branching fraction [σ(pp→H)B(H→Zγ)] relative to the standard model prediction, is extracted from a simultaneous fit to the ℓ+ℓ−γ invariant mass distributions in all categories and is found to be μ=2.4±0.9 for a Higgs boson mass of 125.38 GeV. The statistical significance of the observed excess of events is 2.7 standard deviations. This measurement corresponds to σ(pp→H)B(H→Zγ) = 0.21±0.08 pb.
The observed (expected) upper limit at 95% confidence level on μ is 4.1 (1.8). The ratio of branching fractions B(H→Zγ)/B(H→γγ) is measured to be 1.5+0.7−0.6, which agrees with the standard model prediction of 0.69 ± 0.04 at the 1.5 standard deviation level.