Subtract fractions
- Convert to a common denominator.
- Subtract the numerators.
- Simplify the answer.
Answer: 3/4 - 1/8 = 6/8 - 1/8 = 5/8
🔢 Number
Subtracting fractions
Learn subtracting fractions with a GCSE-style explanation, help guide, worked example, practice question and flashcards.
Global XP
Level 10 / 100 XP
1. Explanation
Key idea
- Subtracting fractions is part of fractions and appears often in KS3–GCSE maths.
- To subtract fractions, use a common denominator then subtract the numerators.
- Use the worked model, help guide, interactive question and flashcards to practise subtracting fractions until the steps feel automatic.
Real-life examples
- Shopping, sport, travel, science, design and everyday decisions all use this skill.
2. Visual
Subtracting fractions learning map
Understand the key idea → follow the help guide → practise a question → check your method → build speed with flashcards.
3. Help guide
How to tackle Subtracting fractions
- Learn the rule: To subtract fractions, use a common denominator then subtract the numerators.
- Worked model: Convert to a common denominator. Subtract the numerators. Simplify the answer.
- Try the interactive question without looking at the answer first.
- Use the flashcards to test the rule, the method and a common check.
4. Worked examples
Step-by-step working
5. Interactive questions
Try it yourself
Calculate 5/6 - 1/3.
6. Flashcards
Master quick recall
Flip each card, then choose whether you know it or need more practice.
0 mastered
FrontRule for Subtracting fractions
BackTo subtract fractions, use a common denominator then subtract the numerators.
FrontExample answer: Calculate 5/6 - 1/3.
Back5/6 - 1/3 = 5/6 - 2/6 = 3/6 = 1/2.
FrontCommon check for Subtracting fractions
BackCheck units/notation, compare with an estimate, and make sure the answer matches the question.
7. Finish
Complete this topic
When you have read the examples, tried the question and reviewed flashcards, claim your topic completion XP.