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Increasing and Decreasing Quantities by a Percent
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Homework
  • Improving Individual Solutions to the Assessment Task (10 minutes)
      • Return the original assessment , Percent Change, to the students together with a second blank copy of the task.
        • Look at your original responses, and think about what you have learned in this lesson.
        • Using what you have learned, try to improve your work.
      • If you have not added questions to individual pieces of work then write your list of questions on the board. Students should select from this list only the questions appropriate to their own work.
  • Solutions: Percent Changes
    • Students may answer Questions 1-3 in several ways. Here are some possible answers:

      1. 40.85 × 1.06 =

        or (40.85 × 0.06) + 40.85 =

        or 40.85 × 0.06 = ANS, ANS + 40.85 =

      2. 56.99 × 0.55 =

        or 56.99 − (56.99 × 0.45) =

        or 56.99 × 0.45 = ANS, 56.99 − ANS =

      3. (450 − 350) ÷ 350 × 100 =

        or 450 − 350 = ANS, ANS ÷ 350 × 100 =

      4. There is no overall change in the price:

        cost of product × 0.8 × 1.25 = cost of product

        or

        cost of product × 4 × 5 = cost of product
        5 4
  • Solutions: Collaborative Activity
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