Three dogs run out of the yard. Two come back. What fraction of the dogs are missing?
1/3
15
Of the 10 books on fairy tales, Gilly borrowed 3. What fraction of the books on fairy tales did she borrow?
3/10
15
Gilly found 15 books on underwater life and brought 7 of these to the table. What fraction of the books on underwater life did she not bring to the table?
8/15
15
Luke saw 9 books about the Solar System and its 9 planets. These were thick books and so he thought that 2 of these would be enough. What fraction of the solar system books did he borrow?