For all the users who gave "A Shot in the Dark" a rating, how many percent of them is a paying subscriber?
"A Shot in the Dark" refers to movie_title = 'A Shot in the Dark'; paying subscriber refers to user_has_payment_method = 1; percentage refers to DIVIDE(COUNT(user_has_payment_method = 1),COUNT(user_has_payment_method))*100
SELECT CAST(SUM(CASE WHEN T1.user_has_payment_method = 1 THEN 1 ELSE 0 END) AS REAL) * 100 / COUNT(*) FROM ratings AS T1 INNER JOIN movies AS T2 ON T1.movie_id = T2.movie_id INNER JOIN lists_users AS T3 ON T1.user_id = T3.user_id WHERE T2.movie_title = 'A Shot in the Dark'