CREATE TABLE table_52445 ("Year" FLOAT, "Network" TEXT, "Lap-by-lap" TEXT, "Color commentator ( s ) " TEXT, "Pit reporters" TEXT, "Host" TEXT, "Ratings" TEXT, "Viewers" TEXT)

What were the ratings for host Chris Economaki who had 12.3 million viewers?
SELECT "Ratings" FROM table_52445 WHERE "Host" = 'chris economaki' AND "Viewers" = '12.3 million'
SELECT "Ratings" FROM "table_52445" WHERE "Host" = 'chris economaki' AND "Viewers" = '12.3 million'