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Ratio & ProportionExam Tips

Exam Tips: Percentage Decrease

Part of Percentage Decrease — GCSE Mathematics

This exam tips covers Exam Tips: Percentage Decrease within Percentage Decrease for GCSE Mathematics. Revise Percentage Decrease in Ratio & Proportion for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears less often, but it can still be a useful differentiator on mixed-topic papers. It is section 5 of 5 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.

Topic position

Section 5 of 5

Practice

12 questions

Recall

22 flashcards

💡 Exam Tips: Percentage Decrease

  • Always subtract from 1 - the percentage (as decimal) to get the multiplier
  • Check your multiplier - it should always be less than 1 for decreases
  • Show your working - write out the multiplier calculation
  • Round sensibly - money to nearest penny, people to whole numbers
  • Check your answer - new amount should be smaller than original
  • Look for key words: "decrease", "discount", "reduction", "fall", "depreciation"
  • Watch units - keep them consistent throughout

Keep building this topic

Read this section alongside the surrounding pages in Percentage Decrease. That gives you the full topic sequence instead of a single isolated revision point.

Worked ExamplesThe Sale DiscountKey Facts: Percentage Decrease

Practice Questions for Percentage Decrease

What multiplier is used to decrease a value by 35%?

  • A. 0.35
  • B. 0.65
  • C. 1.35
  • D. 1.65
1 markfoundation

A shop advertises '25% off everything'. A student says: 'The multiplier is 0.25 because 25% = 0.25.' Explain what is wrong with the student's reasoning and state the correct multiplier.

2 markshigher

Quick Recall Flashcards

What is a percentage decrease?
Finding a new amount after subtracting a percentage from the original amount
What is the multiplier for a 10% decrease?
0.90 (because 1 - 0.10 = 0.90)

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Percentage Decrease