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_6 ( mel_martinez__r_ VARCHAR, sample_size VARCHAR )

### Question ###
What is the percentage for Mel Martinez when the sample size is 800?

### Accurate SQL ###

SELECT mel_martinez__r_ FROM table_name_6 WHERE sample_size = 800