Fractions = Trouble!

Claudia Mills, illustrated by G. Brian Karas

Farrar, Straus and Giroux (BYR)

If Wilson Williams thought multiplication was difficult, he is finding fractions impossible. And when his parents hire a math tutor for him, he is sure he's the only kid in the history of Hill Elementary to have one. Wilson is determined to make sure that no one finds out, not even his best friend, Josh. At least his pet hamster, Pip, is sympathetic. Pip is going to be part of Wilson's science fair project, because any project with hamsters in it is bound to be wonderful. But Josh has the coolest project of all: at what temperature does a pickle explode? Unfortunately, it looks as if Wilson's secret may end up exploding their friendship.

Claudia Mills' Fractions = Trouble is a fun and thoroughly relatable story that Kirkus Reviews calls an "excellent selection for early chapter-book readers."


Read an Excerpt

1Whenever Wilson Williams had a problem, he talked to his hamster, Pip. He had had Pip for only two weeks, but already she understood him better than anybody else in his family did."Multiplication was hard enough," Wilson told Pip on the first Saturday morning in April. "But now we have to do fractions."Pip twitched her nose."Even worse, Mrs. Porter is giving us a huge test in three weeks."Pip blinked."But that's not the worst thing."Pip scampered across Wilson's bedspread. Luckily Wilson had his bedroom door closed so that she couldn't escape and get lost."Wait," Wilson


Praise for Fractions = Trouble!

"Subplots involving Wilson’s science fair project and the disappearance of one of little brother Kipper’s beloved beanbag-animal companions add humor and pathos, respectively—all captured in Karas’s warm pencil sketches… whether math-challenged or math whizzes, readers will look forward to the further adventures of the sympathetic Wilson.” -- Horn Book Magazine

In the Press

FRACTIONS = TROUBLE! by Claudia Mills, G. Brian KarasKirkus Book Reviews
Read the Kirkus Review of FRACTIONS = TROUBLE! . Third-grader Wilson Williams knows he'll never learn fractions: "Multiplication was hard enough," he tells his pet hamster, Pip.
- Kirkus Reviews

Reviews from Goodreads



  • Claudia Mills, illustrated by G. Brian Karas

  • Claudia Mills is the acclaimed author of many books for children, including How Oliver Olson Changed the World  and 7 x 9 = Trouble!.  She lives in Boulder, Colorado.


    G. Brian Karas is the illustrator of numerous books for children. He lives in the Hudson Valley in New York with his family.


  • Claudia Mills
  • G. Brian Karas
    G. Brian Karas


Available Formats and Book Details

Fractions = Trouble!

Claudia Mills, illustrated by G. Brian Karas

Rhode Island Children's Book Award Master List