The university football stadium has 81,500 seats. The stadium is a full book capacity on GameDay. Leila believes only 79,000 seats are occupied by the error of Leila’s prediction.
To find the difference between the actual number of occupied seats and Leila's prediction, you can subtract Leila's prediction from the total number of seats in the stadium.
Total number of seats = 81,500
Leila's prediction = 79,000
Difference = Total number of seats - Leila's prediction
Difference = 81,500 - 79,000
Difference = 2,500
Therefore, Leila's prediction is off by 2,500 seats.