2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/177427The latest data for J/psi and psi' leptonic decays, and the latest measurement of the R-parameter are used to show that the present summary values of the branching ratios of the virtual photon mediated hadronic decays of both J/psi and psi' are overestimated. The current best results are B(J/psi -> gamma^{*} -> h) = (13.3 +- 0.3)%, and B(psi' -> gamma^{*} -> h) = (1.65 +- 0.10)%.2 pages, LaTeX, with 1 fig. Submitted to Phys. Rev. DHigh Energy Physics - Experimenttext