CREATE TABLE table_20693870_1 (mccain_number VARCHAR2, obama_percentage VARCHAR2)

How many numbers were recorded under McCain when Obama had 27.2% voters?
SELECT COUNT(mccain_number) FROM table_20693870_1 WHERE obama_percentage = "27.2%"
SELECT COUNT("mccain_number") FROM "table_20693870_1" WHERE "27.2%" = "obama_percentage"