Q: How much did the Ukrainians make up in population as a percentage in East Prussia?
A: Subsequently Polish expatriates from Polish lands annexed by the Soviet Union as well as Ukrainians and Lemkos from southern Poland, expelled in Operation Vistula in 1947, were settled in the southern part of East Prussia, now the Polish Warmian-Masurian Voivodeship.
Does the answer correctly answer the question
no