Page 1 Ratio and Proportion, Indices and Logarithm Paper 4: Quantitative Aptitude Chapter 1 Part I: Ratio & Proportion Ms. Ritu Gupta, MA (Maths.) Page 2 Ratio and Proportion, Indices and Logarithm Paper 4: Quantitative Aptitude Chapter 1 Part I: Ratio & Proportion Ms. Ritu Gupta, MA (Maths.) Ratio 2 Page 3 Ratio and Proportion, Indices and Logarithm Paper 4: Quantitative Aptitude Chapter 1 Part I: Ratio & Proportion Ms. Ritu Gupta, MA (Maths.) Ratio 2 Learning Objectives How to compute and compare two ratios Effect of increase or decrease of a quantity on the ratio The concept and application of different kinds of ratio 3 Page 4 Ratio and Proportion, Indices and Logarithm Paper 4: Quantitative Aptitude Chapter 1 Part I: Ratio & Proportion Ms. Ritu Gupta, MA (Maths.) Ratio 2 Learning Objectives How to compute and compare two ratios Effect of increase or decrease of a quantity on the ratio The concept and application of different kinds of ratio 3 Ratio A ratio is a comparison of the sizes of two or more quantities of the same kind (in same units) by methods of division. If a and b are two quantities of the same kind then the fraction a/b is called the ratio of a to b. It is written as a : b or a/b The quantities a and b are called the terms of the ratio, a is called the first term or antecedent and b is called the second term or consequent. 4 Page 5 Ratio and Proportion, Indices and Logarithm Paper 4: Quantitative Aptitude Chapter 1 Part I: Ratio & Proportion Ms. Ritu Gupta, MA (Maths.) Ratio 2 Learning Objectives How to compute and compare two ratios Effect of increase or decrease of a quantity on the ratio The concept and application of different kinds of ratio 3 Ratio A ratio is a comparison of the sizes of two or more quantities of the same kind (in same units) by methods of division. If a and b are two quantities of the same kind then the fraction a/b is called the ratio of a to b. It is written as a : b or a/b The quantities a and b are called the terms of the ratio, a is called the first term or antecedent and b is called the second term or consequent. 4 Points to Remember 1 â€¢ Both terms of a ratio can be multiplied or divided by the same (non â€“ zero) number. Usually a ratio is expressed in the lowest form or the simplest form. Example:- 10 : 15 = 10/15 = (5×2)/ (5×3) = 2/3 = 2:3 2 â€¢ Ratio exists only between quantities of the same kind. For Example: There is no ratio between the height of a child and the salary of a teacher. 3 â€¢ The order of the terms in a ratio is important. For example - 4:5 ? 5:4 4 â€¢ If a quantity increases or decreases in the ratio a : b, then new quantity = b of the original quantity / a 5Read More

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