NumberExam Tips

Common Mistakes to Avoid

Part of FDP Conversions · GCSE GCSE Mathematics revision

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 15 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 15

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.

Quick Conversion Tricks Exam Tips Three Ways to Show the Same Thing The FDP Triangle

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!

12 questions on FDP Conversions — practise free

Instant marking, adaptive difficulty, and 22 spaced repetition flashcards. Free until your GCSEs.

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Quick Conversion Tricks

Exam Tips