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Last updated on September 12, 2025
To visually represent data we use different types of chart, such as pie chart, line chart, bar graph. A pie chart represents statistical data and is divided into slices to illustrate numerical proportions. Pie charts are useful to visualize data distribution, but they are less effective for comparing datasets and precise values.
A pie chart is a circular graph where each slice represents the category share of the total. The pie chart represents 100% of the data, with the size of each slice directly proportional to its percentage of the total. Pie charts are used to represent and visualize data like market shares, survey results, and budget allocations.
As you can see in the above image, the pie chart represents the data of a particular dataset, with each slice divided into a proportional size of the w
Pie charts have several properties. The main properties of the pie chart are:
There are several ways to master pie charts. Let’s learn some tips and tricks:
Students should remember that a pie chart represents 100% of a dataset, with each section or slice showing a category’s proportion. The total of all angles in a pie chart is 360°.
Students must remember the formula that is used to determine each section's angle:
Angle = Category Value / Total Value x 360°
They must always check that the sum of all the section angles equals 360°.
Students must be able to convert the given data into percentages for a better visual representation. They must ensure that the total of all percentages adds up to 100%. The formula used to convert data into percentages is mentioned below:
Percentage = Category Value / Total Value x 100
Students often make mistakes when calculating and solving problems relating to pie charts. Here are some common mistakes that students tend to make and how to avoid them:
Pie charts help us to get a visual representation of the data. Let us learn how pie charts are used in different fields.
A class of 30 students was asked about their favorite fruit. The responses were as follows: 12 students liked apples 8 students liked bananas 6 students liked oranges 4 students liked grapes Represent the given data as a pie chart.
Step 1: Find the total number of students: 30
Step 2: Calculate the angles for each fruit:
Angle = Category Value / Total Value × 360°
For Apple:
For Bananas:
For Oranges:
For Grapes:
Step 3: Draw the pie chart.
A family spends money on the following categories every month: Rent: $1200 Groceries: $600 Utilities: $300 Entertainment: $200 Savings: $100 Represent the given data as a pie chart.
Step 1: Calculate the total expenses:
1200 + 600 + 300 + 200 + 100 = 2400 dollars.
Step 2: Calculate the angle for each category
For rent:
For groceries:
For utilities:
For entertainment:
For savings:
Step 3: Draw the pie chart
In a market survey, the following market share percentages were observed for different smartphone brands: Apple: 40% Samsung: 30% Huawei: 15% Xiaomi: 10% Other brands: 5% Represent the given data as a pie chart.
Step 1: Calculate the total percentage:
40 + 30 + 15 + 10 + 5 = 100
Step 2: Since the total percentage is 100%, we can directly convert the percentage into the angle by multiplying by 3.6. Angle = Percentage × 360° / 100.
For Apple:
For Samsung:
For Huawei:
For Xiaomi:
For other brands:
Step 3: Draw the pie chart
A survey was conducted among 360 students to find their favorite school subjects. The results were: Mathematics: 90 students Science: 60 students English: 75 students History: 45 students Art: 90 students Represent the given data as a pie chart.
Step 1: Find the total number of students:
90 + 60 + 75 + 45 + 90 = 360
Step 2: Calculate the angle for each subject:
Mathematics:
Science:
English:
History:
Art:
Step 3: Draw the pie chart
In a class of 30 students, a survey was conducted to find their favorite sports. The results were: Basketball: 10 Students Football: 15 students Cricket: 5 students Represent the following data as a pie chart.
Step 1: Calculate the total number of students:
10 + 15 + 5 = 30
Step 2: Calculate the angles for each category
For basketball:
For Football:
For Cricket:
Step 3: Draw the pie chart.
Jaipreet Kour Wazir is a data wizard with over 5 years of expertise in simplifying complex data concepts. From crunching numbers to crafting insightful visualizations, she turns raw data into compelling stories. Her journey from analytics to education ref
: She compares datasets to puzzle games—the more you play with them, the clearer the picture becomes!