CREATE TABLE table_2259 ("Episode Number" FLOAT, "Episode" TEXT, "Rating" TEXT, "Share" FLOAT, "Rating/Share  ( 18-49 ) " TEXT, "Viewers  ( millions ) " TEXT, "Rank  ( Timeslot ) " TEXT, "Rank  ( Overall ) " TEXT)

What are the ratings/share ratio when viewers are 5.50 Million?
SELECT "Rating/Share (18-49)" FROM table_2259 WHERE "Viewers (millions)" = '5.50'
SELECT "Rating/Share (18-49)" FROM "table_2259" WHERE "Viewers (millions)" = '5.50'