Write SQL query to solve given problem: How many of the worst actors are men and how many of the worst actors are women? Indicate your answer in ratio form.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(SUM(IIF(a_gender = 'M', 1, 0)) AS REAL) / SUM(IIF(a_gender = 'F', 1, 0)) FROM actors WHERE a_quality = 0