Database: european_football_1
Question: What's the winning rate of Club Brugge in the 2021 Premier League?
SQL: SELECT CAST(COUNT(CASE WHEN T1.FTR = 'H' THEN 1 ELSE NULL END) + COUNT(CASE WHEN T1.FTR = 'A' THEN 1 ELSE NULL END) AS REAL) * 100 / COUNT(t1.FTR) FROM matchs AS T1 INNER JOIN divisions AS T2 ON T1.Div = T2.division WHERE T1.season = 2021 AND T1.AwayTeam = 'Club Brugge' OR T1.HomeTeam = 'Club Brugge'