Ratio and Proportion Questions for CAT: Concept, Formulae | Download Ratio and Proportion CAT Questions PDF

By BYJU'S CAT|Updated : November 17th, 2022

Ratio and Proportion CAT Questions are part of the Arithmetic section. Ratio and Proportion are an important topic of the CAT exam. The aspirants can expect 2-3 Ratio and Proportion Questions for CAT, so a basic understanding and conceptual clarity is important to solve these questions efficiently. Check all the important details about Ratio and Proportion CAT Questions, concepts, important formulae, how to solve, and more.

Download the Important Formulae PDF to Ace the QA Section

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Ratio and Proportion CAT Questions are part of the Arithmetic section. Ratio and Proportion are an important topic of the CAT exam. The aspirants can expect 2-3 Ratio and Proportion Questions for CAT, so a basic understanding and conceptual clarity is important to solve these questions efficiently. Check all the important details about Ratio and Proportion CAT Questions, concepts, important formulae, how to solve, and more.

Download the Important Formulae PDF to Ace the QA Section

What are Ratio and Proportion CAT Questions?

To understand the CAT Ratio and Proportion Questions, it is important to understand what is Ratio? and is Ratio and Proportion the same?

As per the mathematical concepts, ratio defines the correlation between two quantities, like A: B, in which B≠0. For example, the ratio of 3:6 is equal to 1:2. However, the statement is known as Proportion, and it is seen to be in direct Proportion.

Note the below example for conceptual clarity on what ratio is.

For example, 4/5 is a ratio, and the proportion statement is 20/25 =4/5. If we find the proportional statement, we get the following things:

20/25 = 4/5

Therefore: 20 x 5 = 25 x 4, i.e., 100 = 100

In comparison, Proportion states the equality of 2 fractions in ratio.

It means that the Proportion is an equation that defines whether the two given ratios are equal or not. For example, the time taken by train to cover 100km per hour is equal to the time taken by it to cover the distance of 200km in 2 hours. Such as 100km/hr = 200km/2hrs.

So, the basic thing is that Ratio and Proportion CAT Questions are the two faces of a coin. If the value of the two ratios is the same, then it will be sailed to be in Proportion.

Ratio and Proportion CAT Questions - Important Formulae

Ratio and Proportion are two mathematical entities that assist in the comparison of numbers. Both are interrelated, and you must have conceptual clarity for the important formulae to accurately solve Ratio and Proportion CAT Questions.

Note the below sections to get an idea about the ratio and proportion formulae for the CAT Exam.

Ratio Formulae

Assume that you have two numbers, and you have to find the ratio of these two numbers. Then, as the definition of ratio, it will be A: B=A/B (Here, A and B are two numbers, and B is not equal to 0).

'A' is the first Term or antecedent, and 'B' is called the second Term or consequent.

For example, the ratio 2:3 is represented as ⅔ (where 2 is antecedent and 3 is consequent)

Proportion Formulae

Assume that there are two ratios, A: B and C: D. Here, 'B' and 'C' are known as mean Terms, while 'A' and 'D' are called extreme terms.

For example: Let us consider one more example of several students in a classroom. Our first ratio of the number of girls to boys is 4:7, and that of the other is 3:5, then the Proportion can be written as:

4:7 :: 3:5 or 4/7 = 3/5

Here, 4 & 5 are the extremes, while 7 & 3 are the means.

☛ Check the detailed CAT Syllabus for a better understanding

CAT Ratio and Proportion Questions PDF

Click on the link below to download the Ratio and Proportion CAT Questions PDF. You must practise these questions as many times as possible to gain better conceptual clarity.

Download Ratio and Proportions Questions for CAT PDF

Ratio and Proportion CAT Questions Sample

Check the below questions to understand the difficulty level CAT questions on Ratio and Proportion.

Example 1: The average marks of Ravi in 10 papers are 80. If the lowest and highest scores in the exam are not considered, then the average is 81. If the highest score is 92, what is Ravi's lowest score?

  1. 60
  2. 55
  3. 62
  4. Cannot be determined

Answer: Correct answer is 60

Solution:

Total marks=80x10=800

Total marks without lowest and highest marks=81x8=648

So, the summation between lowest and highest marks= 800-648=152

Now the highest mark is 92, so the lowest marks will be: 152-92= 60

Example 2: One bacterium split into eight bacteria of the next generation. But due to environmental condition, only 50% survives, and the remaining 50% dies after producing the next generation. If the 7th generation number is 4096 million, then find the number for the first generation.

  1. 2 million
  2. 4 million
  3. 1 million
  4. 8 million

Answer: The correct answer is 1 million

Solution:

Suppose the initial number of bacteria= x

So, in the 2nd generation, the number of bacteria=8x/2=4x

In the 3rd generation the number of bacteria= 16x

4th generation=64x

5th generation=256x

6th generation=1024x

7th generation=4096x

Hence, the value of x=1 million

☛ Related Links:

Important Study Notes to Ace the CAT QA Section

Triangles- QA Formulae
Time, Speed and Distance- QA Formulae
Lines and Angles- QA Formulae
Functions and Graphs- QA Formulae
Inequalities- QA Formulae
Linear Equation- QA Formulae
Logarithm- QA Formulae
Mixture and Alligation- QA Formulae
Percentage- QA Formulae
Permutation and Combination- QA Formulae
Probability-QA Formulae
Time and Work- QA Formulae

Important Topic-Wise Practice Tests

Percentage & its applications
Basics of Quants | Arithmetic Basic | Tricks of Percentages
Geometry & Mensuration
Ratio
Numbers

How to Prepare Ratio and Proportion Questions for CAT?

The Ratio and Proportion CAT Questions can be solved easily and quickly using simple tricks and tips. In the following, our experts have listed shortcut tricks to solve CAT Ratio and Proportion Questions accurately.

  • If A: B and C : D, then it can be solved as (A*C)/(B*D).
  • If A/B=C/D=E/F, then each of these ratios is equal to (A+C+E) ⁄(B+D+F)
  • If P/Q=S/T, then Q/P=T/S (Invertendo)
  • If A/B=C/D, then A/C=B/D (Alterenando)
  • If A/B=C/D, then (A+B)/B=(C+D)/D (Componendo)
  • If P/Q=S/T, then (P-Q)/Q=(S-T)/T (Dividendo)
  • If C/D=A/B, then (C+D)/(C-D)=(A+B)/(A-B) (Componendo and Dividendo)

You must be well-versed with all the basic concepts of Ratio and Proportion CAT Questions to solve its related questions accurately. Note the important formulas and practice CAT Previous Year Question Paper daily to check your understanding level for CAT Ratio and Proportion Questions. The aspirants can also attend BYJU'S Exam Prep CAT Online Coaching classes to clear their doubts on Ratio and Proportion.

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FAQs on Ratio and Proportion Questions for CAT

  • The aspirants can expect 2-3 Ratio and Proportion CAT Questions. As per the previous year's CAT Exam Analysis, there was 1 question from Ratio and Proportions in slot 1 and slot 2; however, 2 questions in slot 3 in last year’s exam.

  • The aspirants can find Ratio and Proportion CAT Questions in the Quants section. Practising and revising is the main key to grip on these questions. Note the important formulas and revise them in your free time. Do attempt BYJU’S Exam Prep CAT Mock Test to analyse your preparation level.

  • Ratio and proportion are the two mathematical components that help to compare two numbers. As per the concept of CAT Ratio and Proportion Questions, the basic formula is fraction-based. For example, 2:5:: 4:7 can be written as 2/5=4/7.

  • As per exam analysis, the aspirants can expect an easy to moderate difficulty level for Ratio and Proportion CAT Questions. So, you must be aware of the basic concepts that you have studied in the 10th standard. 

  • No, Ratio and Proportion are entirely different concepts, or you may say that these two are two faces of a coin. The ratio states the comparison of two values, while proportion defines the equality of these two values.

  • The ratio and proportion are the two fundamental pillars for other mathematical concepts, including statistics and data sufficiency. Ratio and proportion have daily life applications, such as when we are comparing weights, distance, heights, and time; we always try to find the ratio of two numbers. 

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