user: Question: What percentage of the votes did Obama get in the county where 3909 people voted in total?
Columns: ['County', 'Obama%', 'Obama#', 'McCain%', 'McCain#', 'Total']
Types: ['text', 'text', 'real', 'text', 'real', 'real']
Sample row: ['Bernalillo', '60.66%', 168406.0, '39.34%', 109212.0, 277618.0]
SQL:

assistant: SELECT "Obama%" FROM "Table" WHERE "Total" = 3909.0;