Fair Share and Percentage Changes

Dive into the concept of fair share and percentage changes with practical examples on calculating increases and decreases. Explore scenarios of pay raises, product discounts, and percentage adjustments to enhance your understanding of these math concepts.

• Fair share
• Percentage increase
• Percentage decrease
• Math concepts
• Practical examples

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Uploaded on Sep 29, 2024 | 1 Views

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Presentation Transcript

1. A fair share Explicit teaching NSW Department of Education

2. A fair share (1) Launch Each of these people will receive a pay increase of $100 per week. Is the $100 the same for each person?

3. A fair share (2) Launch 2 Each of these products will be reduced by $100 for a sale. Is it fair to decrease all products by $100?

4. A fair share (3) Percentage increase example 1 Increase $30 by 12%. 30 + 3.60 = $33.60

5. A fair share (4) Percentage increase self-explanation prompts 1 Increase $30 by 12%. Why is this being added onto the total? How can we find 12% of $30? 30 + 3.60 = $33.60

6. A fair share (5) Your turn question 1 Increase $150 by 21%

7. A fair share (6) Your turn solutions 1 Increase $150 by 21% 150 + 31.50 = $180.50

8. A fair share (7) Percentage decrease example 2 Decrease $250 by 15%. 250 37.50 = $212.50

9. A fair share(8) Percentage decrease self-explanation prompts 2 Decrease $250 by 15%. How do we know to subtract from the total? If the original price was $300, do we need a larger rectangle? 250 37.50 = $212.50

10. A fair share (9) Your turn question 2 Decrease $720 by 38%

11. A fair share (10) Your turn solution 2 Decrease $720 by 38% 720 273.60 = $446.40