CREATE TABLE table_20350118_1 (obama_number VARCHAR, obama_percentage VARCHAR)

How many different results were there for the number of votes fro Obama in the county where he got 27.8% of the votes?
SELECT COUNT(obama_number) FROM table_20350118_1 WHERE obama_percentage = "27.8%"
SELECT COUNT("obama_number") FROM "table_20350118_1" WHERE "27.8%" = "obama_percentage"