Final answer:
Without specific details from the circle graph, it's impossible to calculate how many more sports books were checked out than biographies from a total of 300 books. We need the percentage representation for each category.
Step-by-step explanation:
To determine how many more sports books were checked out than biographies, we need specific percentages or numbers from the circle graph that represent each category. However, the provided information does not include these details. Without the exact proportions or angles representing sports books and biographies in the circle graph, it is impossible to calculate the difference in the number of books checked out. If we had this information, we would calculate the number for each category by applying the percentage to the total number of books checked out, which is given as 300. Then, we'd subtract the number of biographies from the number of sports books to find how many more sports books were checked out.