### Database Schema:
CREATE TABLE paragraphs (
	id	INTEGER	NULL	PRIMARY KEY,
	ParagraphNum	INTEGER	NOT NULL,
	PlainText	TEXT	NOT NULL,
	character_id	INTEGER	NOT NULL,
	chapter_id	INTEGER	NOT NULL	DEFAULT 0,
	foreign key (character_id) references characters (id),
	foreign key (chapter_id) references chapters (id)
);

CREATE TABLE chapters (
	id	INTEGER	NULL	PRIMARY KEY,
	Act	INTEGER	NOT NULL,
	Scene	INTEGER	NOT NULL,
	Description	TEXT	NOT NULL,
	work_id	INTEGER	NOT NULL,
	foreign key (work_id) references works (id)
);

CREATE TABLE works (
	id	INTEGER	NULL	PRIMARY KEY,
	Title	TEXT	NOT NULL,
	LongTitle	TEXT	NOT NULL,
	Date	INTEGER	NOT NULL,
	GenreType	TEXT	NOT NULL
);

CREATE TABLE characters (
	id	INTEGER	NULL	PRIMARY KEY,
	CharName	TEXT	NOT NULL,
	Abbrev	TEXT	NOT NULL,
	Description	TEXT	NOT NULL
);

### User's Query:
What is the percentage of act number 5 in Titus Andronicus?

### Extra Knowledge:
act number 5 refers to Act = 5; Titus Andronicus refers to Title = 'Titus Andronicus'; percentage = divide(sum(Act = 5), count(Act)) as percentage
SELECT CAST(SUM(IIF(T2.act = 5, 1, 0)) AS REAL) * 100 / COUNT(T2.act) FROM works AS T1 INNER JOIN chapters AS T2 ON T1.id = T2.work_id WHERE T1.Title = 'Titus Andronicus'