CREATE TABLE table_203_378 (id DECIMAL, "against" TEXT, "played" DECIMAL, "won" DECIMAL, "drawn" DECIMAL, "lost" DECIMAL, "win %" TEXT)

at most , what is spain 's win percentage against another country .
SELECT "win %" FROM table_203_378 ORDER BY "win %" DESC LIMIT 1
SELECT "win %" FROM "table_203_378" ORDER BY "win %" DESC NULLS LAST LIMIT 1