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Percent and Percentage

ICSE · Class 8 · Mathematics

Quick revision notes for Percent and Percentage — ICSE Class 8 Mathematics. Key concepts, formulas, and definitions for last-minute revision.

82 questions24 flashcards5 concepts

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Key Topics to Revise

1

1. Core Meaning and Basic Conversions

  • Percent means for every hundred and is written as % or p.c.
  • A percentage is a fraction whose denominator is 100.
  • The numerator of a percentage is called the rate percent.
2

2. Finding Percent, Whole, and Part

  • Direct method finds percent directly using part ÷ whole × 100%.
  • Alternative method often sets x% of a value equal to the given part.
  • The same problem can often be solved in more than one valid way.
3

3. Percentage Increase, Decrease, and Change

  • Increase % and decrease % are based on the original quantity.
  • Percentage change is change on 100, always measured relative to the original value.
  • If a number is decreased by x%, the new number equals (100 - x)/100 of the original.
4

4. Depreciation

  • Depreciation means yearly reduction in value by a fixed percent.
  • Depreciation is calculated on the value at the beginning of each year.
  • For the first year, subtract the depreciation from the present value.

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Full Notes

Key Concepts

Percent means for every hundredA percentage is a fraction whoseTo express a given number asThe formula is x asThe formula is x% of y

Frequently Asked Questions

What are the important topics in Percent and Percentage for ICSE Class 8 Mathematics?
Percent and Percentage covers several key topics that are frequently asked in ICSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Percent and Percentage — ICSE Class 8 Mathematics?
Understand the core concepts first, then work through the 82 practice questions available for this chapter. Revise formulas and 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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