In this sequel to 7 X 9 = Trouble!, 3rd grader Wilson is still struggling with math. This time fractions are giving him a problem. His parents hire a math tutor and Wilson is embarrassed that he is the ONLY kid at his school with a tutor. All the kids at Hill Elementary School are working on their science fair projects and Wilson decides that he will do his project on his pet hamster. His little brother Kipper, a kindergarten math wiz, decides to do his project using tents and Wilson's best friend Josh is trying to determine the temperature at which pickles explode. Wilson discovers something about fractions. Who knew you could use hamsters as examples when working on fractions?