PPT - Ratio, "Ratio, Proportions, indices and logarithms" CA Foundation Notes | EduRev

Quantitative Aptitude for CA CPT

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CA Foundation : PPT - Ratio, "Ratio, Proportions, indices and logarithms" CA Foundation Notes | EduRev

 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 
• Both terms of a ratio can be multiplied or divided by the same (non – 
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 
• 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 
• The order of the terms in a ratio is important. For example -  4:5 ? 5:4  
4 
• If a quantity increases or decreases in the ratio a : b, then new quantity = 
b of the original quantity / a  
5 
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