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Chapter Summary

Fractions in Disguise — Chapter Summary

CBSE · Class 8 · Mathematics

Summary of Fractions in Disguise for CBSE Class 8 Mathematics. Part of the CBSE Class 8 Mathematics syllabus. Percentages are fractions with denominator.

82 questions84 flashcards7 formulas & key relations5 concepts

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Overview

Percentages are fractions with denominator 100. They help compare quantities, show change, and describe profit, loss, interest, discount, inflation, and depreciation. A percentage can be written as a fraction, decimal, or ratio, and the same idea can be used in many different situations. The chapter

Key Concepts

Percent means per centum

Percent means per centum, which means by the hundred or out of hundred. So 25% means 25 out of 100. Percentages are fractions with denominator 100.

A fraction can be changed into

A fraction can be changed into a percentage by multiplying it by 100. For example, 3/4 = 75%.

The rule is y% of value

The rule is y% of value = (y/100) × value. For example, 50% of a value means half of it, because 50% = 1/2 = 0.5.

Scores or quantities with different total

Scores or quantities with different total values cannot be compared directly. They must first be converted into percentages. For example, 42/50 = 84%

Percentage increase = (amount of increase

Percentage increase = (amount of increase / original amount) × 100. Percentage decrease = (amount of decrease / original amount) × 100. A value of 165

Learning Objectives

  • Understand percent as a fraction out of 100
  • Convert fractions, decimals, and ratios into percentages
  • Find a percentage of a quantity using the formula y% of value = (y/100) × value
  • Compare quantities by converting them to percentages
  • Calculate percentage increase and percentage decrease

Frequently Asked Questions

What are the important topics in Fractions in Disguise for CBSE Class 8 Mathematics?
Key topics in Fractions in Disguise include Percent means per centum, A fraction can be changed into, The rule is y% of value, Scores or quantities with different total. Study these first, then practise questions on each for Class 8 exams.
How should I revise Fractions in Disguise for Class 8 exams?
Learn the core ideas first, then work through the 82 practice questions on Fractions in Disguise. 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.

More resources for Fractions in Disguise

All CBSE Class 8 Mathematics Chapter Summary

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