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Primary Maths: Fractions, Decimals and Percentages (Paper 4 (error clinic))
Primary Maths: Fractions, Decimals and Percentages (Paper 4 (error clinic))
This paper retrains the common errors: misplaced decimal points, incomplete simplification and unordered comparison.
Direct answers Before writing a percentage, ask whether you should multiply or divide by 100.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 |
| Suggested time | 20 |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: Primary Maths: Fractions, Decimals and Percentages |
| Level | P5 |
02 Questions (10 items)
- FoundationConvert one half to a decimal and a percentage.
- FoundationConvert 0.8 to a percentage and a fraction in simplest form.
- FoundationConvert one fifth to a percentage.
- IntermediateConvert 0.15 to a fraction in simplest form and a percentage.
- IntermediateWhat is 30% of 50?
- IntermediateConvert seven twentieths to a percentage.
- ChallengeArrange 0.9, four fifths and 85% from largest to smallest.
- ChallengeWrite 0.24 as a fraction in simplest form.
- ChallengeWhat is 12.5% of 200?
- Error redoA student writes 0.05 as 50%. What is the correct percentage?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 0.5 and 50% | One divided by two is 0.5, which is 50%. |
| 2 | 80% and 4/5 | 0.8 times 100 is 80, and 8 over 10 simplifies to 4 over 5. |
| 3 | 20% | One fifth is 20 hundredths, that is 20%. |
| 4 | 3/20 and 15% | 15 over 100 simplifies to 3 over 20, which is 15%. |
| 5 | 15 | 50 times 0.3 is 15. |
| 6 | 35% | Seven twentieths is 35 hundredths, that is 35%. |
| 7 | 0.9, 85%, four fifths | As decimals they are 0.9, 0.85 and 0.8. |
| 8 | 6/25 | 24 over 100 simplifies to 6 over 25 after dividing both by 4. |
| 9 | 25 | 200 times 0.125 is 25. |
| 10 | 5% | The error is shifting the point two places; 0.05 times 100 is 5. |
04 What to do after marking
- After marking, redo only the wrong items and write down which step went wrong (formula, unit, or misread number).
- Repeat the same item two days later; move to the next paper only when both attempts are correct.
- Parents only need the answer and note columns; there is no need to explain every item.
Three steps: make the denominator ten or a hundred, divide to a decimal, then multiply by a hundred for a percentage; always convert to one form before comparing or ordering.Tutor Registration →
Questions and answers are written originally by the TutorZone team and are not taken from any school, publisher or examination authority paper. Every value is checked by computer.