Data Interpretation – Introduction

Data Interpretation


Hello Friends

Today we will discuss some basic concepts related to Data Interpretation (DI).

Data Interpretation is important for every competitive examination as it is being asked in every exam, and moreover the weightage of marks of this topic is also high.



Data Interpretation, as the name suggest, in this we have to interpret the data i.e. we have to analyse the data, draw the conclusions and solve the asked questions.

In Data Interpretation, different type of data i.e. facts and figures are given in the question in different forms of presentation which are as follows:

  • Table – Rows and columns (Easy way)
  • Pie Chart – Circle Graphs (division in sectors in percentages)
  • Bar Graph – Bars (Figures in bar length) (Discrete Data)
  • Line Graphs – XY Graph (Data represented in Lines) (Continuous Data)
  • Mixed Graphs


Concepts used in Data Interpretation-


1) Percentages

The term percent means for every hundred. A fraction whose denominator is 100 is called a percentage.


Data Interpretation percentage  1


Before discussing further, try to remember some percentages in Fraction form as it will help us to do calculations in faster.


Data Interpretation DI Table - percentages into fractions


Now let’s see, how to interpret Data which involves Percentage –


Rule 1

To find out Percentage Change in the value –


Required Percentage Change –


Data Interpretation Rule 1 percentage change DI


FV = Final Value

IV = Initial Value


The denominator part contains the value with which the comparison is made.


Rule 2

To find out X is what % more or less than y


Required Percentage –


Data Interpretation Rule 2 DI


* If answer is positive, then there is percentage increase in value of x over y, and if answer is negative, there is percentage decrease in the value of x.


Rule 3 –


To find our percentage of one value in terms of other i.e.

x is what percent of y


Required Percentage –


Data Interpretation what value of other Rule 3 DI


2) Averages –


In simple language, average is representation of entire group in a single value.


Formula to find out Average –

Data Interpretation average DI


3) Ratios –

Ratio means comparison of like terms (quantities of same kind) in its simplest form. It is written as a:b.

In DI questions, generally questions are asked to find out the ratios between the population of two different countries, or profits of two different companies etc.

Example –

Profits of Company A are 500 and, of Company B are 200. Find out the ratio of the profits of the two countries.

Solution – 500:600 = 5:6

We will discuss many examples, especially complex in the coming articles and quizzes.



With this we have completed Today’s topic. Hope you have learned today.


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