Question: Between Rome and Juliet, which character was mentioned the most in the The Tragedy of Romeo and Juliet? Calculate for Romeo and Juliet's individual amount of appearance in percentage against the overall number of characters that appeared in the said work.
SQL: SELECT SUM(IIF(T4.CharName = 'Romeo', 1, 0)), SUM(IIF(T4.CharName = 'Juliet', 1, 0)), CAST(SUM(IIF(T4.CharName = 'Romeo', 1, 0)) + SUM(IIF(T4.CharName = 'Juliet', 1, 0)) AS REAL) * 100 / COUNT(T1.id) FROM works AS T1 INNER JOIN chapters AS T2 ON T1.id = T2.work_id INNER JOIN paragraphs AS T3 ON T2.id = T3.chapter_id INNER JOIN characters AS T4 ON T3.character_id = T4.id