Solve the following sql problem:
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.

Schema:
SCHEMA:
- Table: chapters
  - Column: id
    - Samples: [18704, 18705, 18706, 18707, 18708]
  - Column: Act
    - Samples: [1, 1, 1, 1, 1]
  - Column: Scene
    - Samples: [1, 2, 3, 4, 5]
  - Column: Description
    - Samples: [DUKE ORSINO’s palace., The sea-coast., OLIVIA’S house., DUKE ORSINO’s palace., OLIVIA’S house.]
  - Column: work_id
    - Samples: [1, 1, 1, 1, 1]
- Table: characters
  - Column: id
    - Samples: [1, 2, 3, 4, 5]
  - Column: CharName
    - Samples: [First Apparition, First Citizen, First Conspirator, First Gentleman, First Goth]
  - Column: Abbrev
    - Samples: [First Apparition, First Citizen, First Conspirator, First Gentleman, First Goth]
  - Column: Description
    - Samples: [, , , , ]
- Table: paragraphs
  - Column: id
    - Samples: [630863, 630864, 630865, 630866, 630867]
  - Column: ParagraphNum
    - Samples: [3, 4, 19, 20, 21]
  - Column: PlainText
    - Samples: [[Enter DUKE ORSINO, CURIO, and other Lords; Musicians attending], If music be the food of love, play on;
Give me excess of it, that, sur..., Will you go hunt, my lord?, What, Curio?, The hart. (truncated)]
  - Column: character_id
    - Samples: [1261, 840, 297, 840, 297]
  - Column: chapter_id
    - Samples: [18704, 18704, 18704, 18704, 18704]
- Table: works
  - Column: id
    - Samples: [1, 2, 3, 4, 5]
  - Column: Title
    - Samples: [Twelfth Night, All's Well That Ends Well, Antony and Cleopatra, As You Like It, Comedy of Errors]
  - Column: LongTitle
    - Samples: [Twelfth Night, Or What You Will, All's Well That Ends Well, Antony and Cleopatra, As You Like It, The Comedy of Errors]
  - Column: Date
    - Samples: [1599, 1602, 1606, 1599, 1589]
  - Column: GenreType
    - Samples: [Comedy, Comedy, Tragedy, Comedy, Comedy]

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