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Ratio and Proportion — Chapter Summary

ICSE · Class 7 · Mathematics

Summary of Ratio and Proportion for ICSE Class 7 Mathematics. Key concepts: A ratio is a relationship, In the ratio 3 and A ratio is in simplest form.

52 questions24 flashcards14 formulas & key relations5 concepts

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Overview

Ratio is a comparison of two quantities of the same kind with the same unit. It is written with a colon and gives a pure number with no unit. Ratio and proportion help compare quantities, simplify relationships, and solve problems involving sharing, scaling, and unknown terms.

Key Concepts

A ratio is a relationship between

A ratio is a relationship between two quantities of the same kind with same unit, obtained by dividing the first quantity by the second. It is written

In the ratio 3

In the ratio 3:4, 3 is the antecedent and 4 is the consequent. The two terms of a ratio are co-prime in simplest form.

A ratio is in simplest form

A ratio is in simplest form when both terms are co-prime, so their H.C.F. is 1. For example, 4:5 is already in simplest form, while 6:8 is not. To sim

A ratio with fractions can be

A ratio with fractions can be converted into whole numbers by multiplying each term by the L.C.M. of the denominators. If each term of a ratio is mult

If a quantity is divided

If a quantity is divided in the ratio 2:3, the whole quantity is split into 2 + 3 = 5 equal parts, and the shares are taken in that proportion.

Learning Objectives

  • Define ratio and proportion correctly
  • Identify antecedent and consequent in a ratio
  • Write ratios in simplest form
  • Convert fractional ratios into whole number ratios
  • Divide a quantity in a given ratio

Frequently Asked Questions

What are the important topics in Ratio and Proportion for ICSE Class 7 Mathematics?
Key topics in Ratio and Proportion include Ratio: Meaning, Terms, and Simplest Form, Converting Fractional Ratios and Sharing in a Ratio, Ratio Problems Using L.C.M., H.C.F., and Unitary Method, Proportion, Extremes, Means, and Fourth Proportional. Study these first, then practise questions on each for Class 7 exams.
How should I revise Ratio and Proportion for Class 7 exams?
Learn the core ideas first, then work through the 52 practice questions on Ratio and Proportion. 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 Ratio and Proportion

All ICSE Class 7 Mathematics Chapter Summary

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