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Percent and Percentage — Revision Notes

ICSE · Class 7 · Mathematics

Percent and Percentage revision notes for ICSE Class 7 Mathematics: 4 topics in quick points. Part of the ICSE Class 7 Mathematics syllabus.

60 questions28 flashcards9 formulas & key relations5 concepts

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Key Topics to Revise

1

1. Basic idea of percent

  • CENT means hundred.
  • Percent means per hundred or out of hundred.
  • Percent notation is written using the % sign.
2

2. Converting between fraction, decimal, ratio and percent

  • To change a fraction or decimal into percent, multiply by 100 and write %.
  • To change a percent into a fraction or decimal, divide by 100 and remove %.
  • A ratio can also be written as percent after converting it into a fraction.
3

3. One quantity as a percent of another

  • First make the units the same if needed.
  • Then form the fraction with the quantity being compared as the numerator and the base quantity as the denominator.
  • Multiply by 100 and write %.
4

4. Percentage of a quantity

  • p% of N means p/100 × N.
  • This is used to find a part of a quantity.
  • The whole quantity, whole work, etc. are always taken as 100%.

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Full Notes

Key Concepts

The word cent means hundredMultiply the value by 100Divide the percent by 100First make sure both quantitiesUse p% of N = (p/100)

Frequently Asked Questions

What are the important topics in Percent and Percentage for ICSE Class 7 Mathematics?
Key topics in Percent and Percentage include Basic idea of percent, Converting between fraction, decimal, ratio and percent, One quantity as a percent of another, Percentage of a quantity. Study these first, then practise questions on each for Class 7 exams.
How should I revise Percent and Percentage for Class 7 exams?
Learn the core ideas first, then work through the 60 practice questions on Percent and Percentage. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 7 Mathematics Revision Notes

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