user: ### NOW ANSWER:
Question: What is the rating/share total number if the total viewers is 12.75 million?
Columns: ['Episode number Production number', 'Title', 'Original airing', 'Rating', 'Share', 'Rating/share (18–49)', 'Total viewers (in millions)']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['24 2-01', 'Home Front', 'September 30, 2007', '9.1', 15.0, '5.1', '13.26']
SQL:

assistant: SELECT COUNT("Rating/share (18–49)") FROM "Table" WHERE "Total viewers (in millions)" = '12.75';