By : Raghavendra Singh
Updated : Dec 30, 2020, 18:09
A pie chart is used to express the relationship between a part-to-whole unit. Each slice of the pie chart shows one part, and all the slices are added together, which equals the whole. It is a visual representation of data. A pie chart is used in everyday lives. It comes under the Data Interpretation & Logical Reasoning section of the CAT Exam and is very scoring.
Use of a pie chart:
As the understanding of a pie chart helps us draw an interpretation of data, questions related to Pie charts are asked in various MBA entrance exams such as CAT, SNAP, NMAT, CMAT, XAT, IIFT, MAH-CET etc.
Topic | Explanation |
Formula | A pie chart contains different sectors and segments which represent the total percentage. The total of all segments is 360 degree and in terms of percentage the total value of a pie is 100%. |
Percentage for a pie chart | In order to compute percentage, the formula is given as, Mentioned Data / Total value X 360 degree |
Convert X% to angle | x/ 100 X 360 For eg, 20% , (20/100 X 360 degree) = 72 degrees i.e 20% from a 72 degree angle at the centre |
The list of recommended books for solving Pie chart questions for CAT include the following:
Books | Authors |
Data Interpretation | Arun Sharma |
Quantitative Aptitude for Competitive Examinations | R. S. Agarwal |
Data Interpretation & Data Sufficiency | Ananta Ashisha |
Logical Reasoning and Data Interpretation for the CAT | Nishit K. Sinha |
Data Interpretation Simplified | Jaggan Saneja |
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1. What is a pie chart?
It is a visual representation of data. The slices of a pie show different units in relation to the complete pie.
2. What is the use of a pie chart?
The pie charts are used to represent the various units and fractions of the whole unit and understand the contribution of the various parts to the complete chart.
3. How can you calculate the percentage on a pie chart?
To measure the angle of a slice, you can divide it by 360 and multiply the value into 100. The data in terms of percentage will be computed.
4. How to find the pieces of data in a pie chart?
To find the number of data pieces in a pie chart, multiply the percentage with the total number of data sets and then divide it by 100.
5. When can a pie chart be used?
They can be used when you want to compare the data in a visually pleasant format. In case you have categorical data or nominal category, you can use a pie chart; each slice represents a category. Pie charts should be used in case you have a set of data. In a pie chart, a proportion is represented by 100 per cent.
6. When not to use a pie chart?
It can be tough to compare the size of one part of the chart to another, especially when the slices aren’t adjacent to one another and are similar. In such a case, a column or bar chart is used.