NumberExam Tips

Common Mistakes to Avoid

Part of FDP ConversionsGCSE Mathematics

This exam tips covers Common Mistakes to Avoid within FDP Conversions for GCSE Mathematics. Revise FDP Conversions in Number 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 13 of 14 in this topic. Treat this as a marking guide for what examiners are looking for, not just a fact list.

Topic position

Section 13 of 14

Practice

12 questions

Recall

22 flashcards

Common Mistakes to Avoid

❌ Wrong: 0.5 = 5% ✅ Right: 0.5 = 50%

Remember to ×100 when converting to %

❌ Wrong: 25% = 0.25/100 ✅ Right: 25% = 25/100 = 0.25

% already means /100, don't divide again

❌ Wrong: 0.33 = 1/3 ✅ Right: 0.333... = 1/3

1/3 is recurring, not terminating

Keep building this topic

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

Practice Questions for FDP Conversions

Which decimal is equal to 3/4?

  • A. 0.34
  • B. 0.75
  • C. 0.43
  • D. 1.33
1 markfoundation

Explain why 1/3 cannot be written as an exact decimal, and write 1/3 using correct notation for recurring decimals.

2 marksstandard

Quick Recall Flashcards

FDP Triangle
F (top) D (left) ← → P (right) F→D: divide F→P: ×100 D→P: ×100
Halves family
1/2 = 0.5 = 50% Must know instantly!

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