Find parts of quantities and discounts
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What is 20% of 80?
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Answer: 16
- 20% = 20/100.
- 80 × 20/100 = 16.
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Curriculum reference
Victorian Curriculum F–10 Version 2.0
Pi Leo practice scope
Connect familiar fractions, decimals and percentages to actual amounts.
Read the official VCAA curriculum description (VC2M6N07)
These quizzes practise concepts within this topic. Multiple-choice answers alone do not demonstrate drawing, conducting an investigation or using a digital tool.
Activities to practise beyond the quiz
- Supported by the guided activity; selecting an MCQ does not demonstrate this action.
- VC2M6N07-C01Use convenient benchmark parts such as 10%, 25% and 50%, then combine or scale them.
- VC2M6N07-C02Use complementary percentages to calculate an amount remaining, including a sale price after a discount.
- VC2M6N07-C03Fractions describe an equal share of a quantity. The same share can often be written as a familiar decimal or percentage.
- VC2M6N07-C04Selecting efficient fraction/decimal/percentage strategies with and without digital tools.
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Subskills
These practice subskills map to the curriculum topic. Guided activities cover skills beyond multiple-choice questions.
Descriptor-derived subskills
- D01Find a familiar percentageUse convenient benchmark parts such as 10%, 25% and 50%, then combine or scale them.
- D02Find the amount left, including sale pricesUse complementary percentages to calculate an amount remaining, including a sale price after a discount.
- D03Use a fraction of the wholeFractions describe an equal share of a quantity. The same share can often be written as a familiar decimal or percentage.