The ratio of the W + \geq 1 jet cross section to the inclusive W
cross section is measured using W^+/- -> e^+/- nu events from pbar p
collisions at sqrt s = 1.8 TeV.  The data are from 108 pb^-1 of integrated
luminosity collected with the Collider Detector at Fermilab (CDF).
Measurements of the cross section ratio for jet transverse energy thresholds
(E^min_T) ranging from 15 to 95 GeV are compared to theoretical predictions
using next-to-leading order QCD calculations.  Data and theory agree well for
E^min_T > 25 GeV, where the predictions lie within 1 standard deviation of the
measured values.