ANKARA - Votes in favor of Turkish constitutional changes that could give President Tayyip Erdogan sweeping new powers stood at 54.6 percent with three quarters of ballots opened, the state-run Anadolu news agency said on Sunday. Data cited by Anadolu showed a high percentage of 'Yes' votes in central Anatolia, while 'No' votes led in coastal regions near the Aegean Sea and Turkey's mainly Kurdish southeast.