CREATE TABLE table_28637 ("Rank" FLOAT, "Couple" TEXT, "Judges" FLOAT, "Public" FLOAT, "Total" FLOAT, "Vote percentage" TEXT, "Result" TEXT)

what couple had a vote percentage of 5.8%?
SELECT "Couple" FROM table_28637 WHERE "Vote percentage" = '5.8%'
SELECT "Couple" FROM "table_28637" WHERE "Vote percentage" = '5.8%'