Adding and subtracting fractions
Lesson 8 of 11
Simplifying answers
Objective. Write a fraction in its simplest form.
The key idea
Divide numerator and denominator by their highest common factor. The value does not change — only the way it is written.
Worked example
Simplify 18/24.
- 1Factors of 18 and 24 share 6.
- 218 ÷ 6 = 3 and 24 ÷ 6 = 4.
Answer: 3/4
Practice
Each question comes with a picture and a listen button. Try it first, then reveal the answer.
Common mistake. Dividing only one part of the fraction.
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