What percentage of players have Legbreak skill?
Legbreak skill refers to Bowling_skill = 'Legbreak' ; percentage = divide(sum(Player_Id) when Bowling_skill = 'Legbreak', count(Player_Id)) as percentage
SELECT CAST(SUM(CASE WHEN T2.Bowling_skill = ' Legbreak' THEN 1 ELSE 0 END) AS REAL) * 100 / TOTAL(T1.Player_Id) FROM Player AS T1 INNER JOIN Bowling_Style AS T2 ON T1.Bowling_skill = T2.Bowling_Id