What is the percentage of matches that are won by runs?
won by runs refers to win_type = 1; percentage refers to DIVIDE(COUNT(win_type = 1), COUNT(Win_Type)) * 100
SELECT CAST(SUM(CASE WHEN T1.win_type = 1 THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(T1.Win_Type) FROM Match AS T1 INNER JOIN Win_By AS T2 ON T1.Win_Type = T2.Win_Id