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Grade 9 Revision & Practice

Choose mathematics for percentage practice and marking guidance, or Integrated Science for a forces preview. A marking guide is most useful when you identify why a step earns credit. In science, name the effect you are describing and explain the mechanism in a complete sentence.

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Percentages and scientific explanations

  1. Translate a percentage into a fraction out of 100.
  2. Include a unit where the question requires one.
  3. For forces questions, describe both the force and its effect on motion.

Try a short question

Find 20% of 350.

Answer and explanation

20/100 × 350 = 70. Alternatively, find 10% (35) and double it.

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