Percentage decrease
- Find the percentage amount.
- Subtract it from the original.
- Check the new amount is smaller.
Answer: Decrease 80 by 10% gives 72
🔢 Number
Percentage decrease
Learn percentage decrease with a GCSE-style explanation, help guide, worked example, practice question and flashcards.
Global XP
Level 10 / 100 XP
1. Explanation
Key idea
- Percentage decrease is part of percentages and appears often in KS3–GCSE maths.
- Percentage decrease means subtract the percentage amount from the original.
- Use the worked model, help guide, interactive question and flashcards to practise percentage decrease until the steps feel automatic.
Real-life examples
- Shopping, sport, travel, science, design and everyday decisions all use this skill.
2. Visual
Percentage decrease 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 Percentage decrease
- Learn the rule: Percentage decrease means subtract the percentage amount from the original.
- Worked model: Find the percentage amount. Subtract it from the original. Check the new amount is smaller.
- 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
Decrease £60 by 25%.
6. Flashcards
Master quick recall
Flip each card, then choose whether you know it or need more practice.
0 mastered
FrontRule for Percentage decrease
BackPercentage decrease means subtract the percentage amount from the original.
FrontExample answer: Decrease £60 by 25%.
Back25% of 60 is 15. £60 - £15 = £45.
FrontCommon check for Percentage decrease
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.