Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_20799587_1 (obama_number INTEGER, mccain_percentage VARCHAR)
### Question:
How many people voted for Obama in the county where McCain got 72.75% of the votes?
### Answer:
SELECT MIN(obama_number) FROM table_20799587_1 WHERE mccain_percentage = "72.75%"