CREATE TABLE table_204_190 (id DECIMAL, "rank" DECIMAL, "city" TEXT, "county" TEXT, "state" TEXT, "percentage" TEXT)

what is the top city for percent korean american population ?
SELECT "city" FROM table_204_190 ORDER BY "percentage" DESC LIMIT 1
SELECT "city" FROM "table_204_190" ORDER BY "percentage" DESC NULLS LAST LIMIT 1