Adding Fractions With Different Denominators: Step-by-Step Example
22 October 2026
Adding proper fractions with different denominators can seem tricky at first. The key is to make the denominators the same before you add.
Example question
Add 1/4 + 1/6
Step 1: Find a common denominator for 4 and 6. The lowest common denominator is 12.
Step 2: Change each fraction to have denominator 12.
1/4 = 3/12 (because 4 × 3 = 12, so 1 × 3 = 3)
1/6 = 2/12 (because 6 × 2 = 12, so 1 × 2 = 2)
Step 3: Add the numerators. 3 + 2 = 5.
Step 4: Write the answer with the common denominator. 5/12
Step 5: Check if you can simplify. 5/12 cannot be simplified further.
The answer is 5/12.
Now your child can spot when two fractions need a common denominator before adding. They are ready to practise more questions just like this.
