Among the matches, what percentage have a winning margin above 100?
winning margin above 100 refers to Win_Margin > 100; percentage = divide(count(Match_Id) when Win_Margin > 100, count(Match_Id)) as percentage
SELECT CAST(COUNT(CASE WHEN Win_Margin > 100 THEN 1 ELSE 0 END) AS REAL) * 100 / TOTAL(Match_Id) FROM `Match`