Answer:
1,260 books (or C)
Step-by-step explanation:
1. 2/5 of fiction (12,500) are out, so 5,000 are out
2. 2/5 of non-fiction (19,000) are out, so 7,600 are out
3. Total books checked out are 12,600
4. 1/10 of checked out books are due this week, so 1,260 books (10%)
20 because when you divide 12 by 3/5 you get 20 use a calculator
First multiply (-5/6) and (1/6) to get

then you subtract that from (8/9) to get

final answer is