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_20722805_1 ( mccain_percentage VARCHAR, obama_percentage VARCHAR )

### Question ###
What was McCain's percentage when Obama had 64.39% of the vote?

### Accurate SQL ###

SELECT mccain_percentage FROM table_20722805_1 WHERE obama_percentage = "64.39%"