How to explain subtract fractions with the same denominator using bar models in add & subtract fractions to your child: Example question
1 November 2026
Understanding how to subtract fractions with the same denominator can feel much simpler when you use bar models. These models give your child a clear picture of what is happening with the numbers, making the process far less abstract.
Example question
Subtract 3/8 from 7/8 using bar models.
Step 1: Draw a bar split into 8 equal parts. Shade 7 parts to show 7/8.
Step 2: Draw another bar split into 8 equal parts. Shade 3 parts to show 3/8.
Step 3: Take away 3 shaded parts from the 7 shaded parts in the first bar.
Step 4: Count the shaded parts left in the first bar. There are 4 parts left.
Answer: 7/8 - 3/8 = 4/8
Key insight: When the denominators are the same, subtract the top numbers (numerators) and keep the bottom number (denominator) the same. Bar models help you see this clearly.
After seeing this example, your child will be able to spot when two fractions have the same denominator and know how to subtract them using a bar model. This skill is important for building confidence with fractions, and similar questions are ready for practice.
