中文（繁體）
中文（简体）
English
Primary 6 Maths: Applications of Percentages — Practice Paper 2
Primary 6 Maths: Applications of Percentages — Practice Paper 2
Paper 2 trains three moves: finding a percentage of an amount, finding the percentage increase or decrease between two numbers, and working back from a part to the whole. The settings are discounts, price rises and the weight of sugar.
Quick answer 10 questions, about 20 minutes. Items 01 to 03 find percentages and a sale price at 20% off; items 04 to 06 find a percentage and the increase from 45 to 54 and the decrease from 80 to 68; items 07 to 09 work back to the whole, add 15% to a price and take 12% of 500 g; item 10 redos subtracting the percentage number itself.
01 Paper details (check answers afterwards)
| Item | Detail |
|---|---|
| Questions | 10 questions |
| Suggested time | 20 minutes |
| Difficulty mix | Foundation 3 · Intermediate 3 · Challenge 3 · Error redo 1 |
| Chapter | Chapter: Primary 6 Maths: Applications of Percentages — Tutor Lesson Plan |
| Level | Primary 6 |
02 Questions (10 items)
- FoundationWhat is 25% of 80?
- FoundationWhat is 40% of 250?
- FoundationA jacket costs $120 and is sold at 20% off. What is the selling price?
- Intermediate60 is what percentage of 300?
- IntermediateA number grows from 45 to 54. What is the percentage increase?
- IntermediateA number falls from 80 to 68. What is the percentage decrease?
- Challenge35% of a number is 84. Find the number.
- ChallengeA pen costs $40 and the price rises by 15%. What is the new price?
- ChallengeWhat is 12% of 500 g of sugar?
- Error redoA pupil says a 20% decrease from 80 gives 60. What went wrong, and what is the answer?
03 Answers and one-line notes
| # | Answer | One-line note |
|---|---|---|
| 1 | 20 | 80 x 25/100 = 80 x 0.25 = 20. |
| 2 | 100 | Ten per cent of 250 is 25, so 40% is 25 x 4 = 100. |
| 3 | $96 | Twenty per cent off means paying 80%: 120 x 0.8 = 96. |
| 4 | 20% | 60 divided by 300 is 0.2, that is 20%. |
| 5 | 20% | The increase is 9, over the original 45: 9 divided by 45 is 20%. |
| 6 | 15% | The decrease is 12, and 12 divided by 80 is 0.15, that is 15%. |
| 7 | 240 | Work back to the whole: 84 divided by 0.35 gives 240. |
| 8 | $46 | The new price is 115% of the old: 40 x 1.15 = 46. |
| 9 | 60 g | 500 x 0.12 = 60 g. |
| 10 | The pupil subtracted 20 instead of 20% of 80, which is 16; the answer is 80 x 0.8 = 64 | A percentage must be taken of the original amount: 20% of 80 is 16, so the answer is 64. |
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.
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.
