Year 9 - Maths
Running a small business
Maths in the workplace
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
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Lesson Summary
You will learn to understand how maths is used by independent business owners.
Key Notes
- Percentages are regularly used to calculate percentage profit
- Averages are used to track performance over a set period
- Performance data may be easier to analyse if presented graphically
Vocabulary To Learn
- Percentage profit: Percentage profit is the increase when referencing something that is sold for more than the cost price given as a percentage of the original amount.
- Average: An average is a single number expressing the central or typical value in a set of data; the mode, the median, and the mean.
Common Mistakes To Avoid
- Pupils may be confused about whether to multiply or divide when dealing with reversing percentage change.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Percentages are regularly used to calculate percentage profit. Averages are used to track performance over a set period.
2. Use this key word in a maths sentence and explain it clearly. 'Percentage profit'
Percentage profit is the increase when referencing something that is sold for more than the cost price given as a percentage of the original amount. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Pupils may be confused about whether to multiply or divide when dealing with reversing percentage change. Correction: The first learning cycle addresses this and you may wish to display the example on a whiteboard for the entire lesson for pupils to refer to.
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Browse all guides in the Year 9 Maths guide library.