CREATE TABLE table_42738 ("Season" CLOB, "Ep #" FLOAT, "Season Premiere" CLOB, "Season Finale" CLOB, "Ranking" CLOB, "Viewers  ( Households in millions ) " CLOB, "Rating" CLOB)

What was the ranking for the episode number before 24 that had a rating of 25.7?
SELECT "Ranking" FROM table_42738 WHERE "Ep #" < '24' AND "Rating" = '25.7'
SELECT "Ranking" FROM "table_42738" WHERE "Ep #" < '24' AND "Rating" = '25.7'