Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_80 ( win__percentage INTEGER, year VARCHAR, coach VARCHAR, record VARCHAR )

### Question ###
What is the largest win percentage when John Gartin is coach, the record is 11-0, and the year is 2009?

### Accurate SQL ###

SELECT MAX(win__percentage) FROM table_name_80 WHERE coach = "john gartin" AND record = "11-0" AND year = "2009"