WGPR-TV
... that when WGPR-TV in Detroit was converted from a station serving Black and ethnic audiences to a CBS affiliate, it experienced ratings increases of 11,000 percent?
... that when <b id="mwBFU"><a href="./WWJ-TV" id="mwBFY" rel="mw:WikiLink" title="WWJ-TV"><span about="#mwt57" class="nowrap" data-mw='{"parts":[{"template":{"target":{"wt":"nowrap","href":"./Template:Nowrap"},"params":{"1":{"wt":"WGPR-TV"}},"i":0}}]}' id="mwBFc" typeof="mw:Transclusion">WGPR-TV</span></a></b> in Detroit was converted from a station serving Black and ethnic audiences to a <a href="./CBS" id="mwBFg" rel="mw:WikiLink" title="CBS">CBS</a> affiliate, it experienced ratings increases of 11,000 percent?