Write SQL query to solve given problem: What is the percentage of female customers who subscribed to the email list?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT CAST(COUNT(CASE WHEN Gender = 'F' THEN 1 ELSE NULL END) AS REAL) * 100 / COUNT(SubscribedToEmailList) FROM customers WHERE SubscribedToEmailList = 'TRUE'