What is the percentage of all right-handed batting players among all the other players?
right-handed batting refers to Batting_hand = 'Right-hand bat'; percentage = divide(count(Player_Id where Batting_hand = 'Right-hand bat'), count(Player_Id)) * 100%
SELECT CAST(SUM(CASE WHEN T1.Batting_hand = 'Right-hand bat' THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T2.Player_Id) FROM Batting_Style AS T1 INNER JOIN Player AS T2 ON T2.Batting_hand = T1.Batting_Id