A measurement of the production cross section ratio is presented. The and bottomonium states, promptly produced in pp collisions at , are detected by the CMS experiment at the CERN LHC through their radiative decays . The emitted photons are measured through their conversion to pairs, whose reconstruction allows the two states to be resolved. The is measured through its decay to two muons. An event sample corresponding to an integrated luminosity of is used to measure the cross section ratio in a phase-space region defined by the photon pseudorapidity, ; the rapidity, ; and the transverse momentum, . The cross section ratio shows no significant dependence on the transverse momentum, with a measured average value of , where the first uncertainty is the combination of the experimental statistical and systematic uncertainties and the second is from the uncertainty in the ratio of the branching fractions.