Simplifying fractions worksheets
Reducing fractions to their simplest form by dividing the top and bottom by a common factor.
Download the free simplifying fractions worksheet (PDF)
Simplifying fractions worksheet
What’s on the worksheet
- 50 questions on simplifying fractions, sized for US Letter paper
- 3 pages of questions plus an answer key on the last page
- Written for grades 4–5, matching Common Core 4.NF.A.1
- Name and date lines at the top, and room to show the work
Preview the worksheet and answer key
Make a new simplifying fractions worksheet
Need another page for extra practice, a retake or a second group in class? The free Mathify Kids test maker builds a fresh simplifying fractions worksheet with different numbers every time. Choose Core, Standard or Challenge level, print it with its own answer key, or let your child take it on screen and see the score straight away.
Simplifying fractions: a worked example (Simplify 18/24)
- Find the greatest common factor of 18 and 24: it is 6.
- Divide both by 6: 18 ÷ 6 = 3 and 24 ÷ 6 = 4.
- So 18/24 = 3/4.
How to use it at home and in class
At home
If a fraction is still even on top and bottom, it isn’t in simplest form yet. Ten problems a day works better than a whole sheet at once. Mark them together with the answer key, then ask your child to explain one they got wrong: finding the mistake themselves is where the learning happens.
In class
Use the first row as a warm-up, a full page for independent practice, or five questions as an exit ticket. For a retake or a second group, make a new version with the test maker so every child gets different numbers.
Mistakes to watch for
- Stopping too early, like 18/24 = 9/12, which can be simplified further.
- Dividing the top and bottom by different numbers.
What to practice before and after simplifying fractions
- Before: equivalent fractions. If this sheet is a struggle, go back a step.
- After: comparing fractions, once this one is mostly right.
- Learn it first: the simplifying fractions lesson and the fractions chart.
More fractions worksheets
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Questions parents ask
How do you know a fraction is fully simplified?
When the only number that divides into both the top and bottom is 1.
What grade is this simplifying fractions worksheet for?
It is written for grades 4–5 and matches Common Core standard 4.NF.A.1.
Can I get a different version of this simplifying fractions worksheet?
Yes. Use the free Mathify Kids test maker to make a new simplifying fractions worksheet with different numbers every time, at Core, Standard or Challenge level, with its own answer key.