Complex sentence: The total potential audience across a season is 800,000 seats, but average audience rates for the 3800-seat theater in 2011 were just 79.2%, down from a peak of 88% in 2009.
Split into simpler sentences: The total potential audience across a season is 800,000 seats. The average audience rate for the 3800-seat theater in 2011 was 79.2%, down from a peak of 88% in 2009.