Question: Among the coaches who was never a player, who has highest percentage of game winning? Provide the given name of the coach and team he coached.
SQL: SELECT T2.nameGiven, T3.name FROM Coaches AS T1 INNER JOIN Master AS T2 ON T2.coachID = T1.coachID INNER JOIN Teams AS T3 ON T1.lgID = T3.lgID WHERE T1.coachID IS NOT NULL ORDER BY CAST(T1.w AS REAL) / T1.g DESC LIMIT 1