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_78 ( win__percentage INTEGER, year VARCHAR, coach VARCHAR, crew VARCHAR )

### Question ###
What is the total number of win % when John Gartin is coach, the crew is varsity 8+, and the year is 2005?

### Accurate SQL ###

SELECT SUM(win__percentage) FROM table_name_78 WHERE coach = "john gartin" AND crew = "varsity 8+" AND year = "2005"