LEARN MATH STEP BY STEP THROUGH VERY EASY PROCESS

PIE CHART - USE OF PIE CHART

**PIE CHART - USE OF PIE CHART -**

**Uses of Pie Chart -**

**Whenever
some data has to be represented visually as a fractional part of a whole, we
use pie charts. It is used to compare the data and see
why one is smaller/greater than the other.**

**Therefore,
when we are dealing with a limited number of buckets and discrete data sets, it’s better to use a pie chart. Listed below are a few uses of a pie chart:**

**· In a business, it is used to compare the growth areas such as profit and loss.**

**· In school, pie charts are used to show
the time allotted
to each section, the grades of students in a form of
percentages, etc.**

**· Pie charts are used in comparing the relative size of
data of people owning the same vehicles, similar
houses, etc.**

**· They are used to represent the marketing and sales data for the comparison of brands.Steps to Construct Pie Chart**

**We
use the following steps to construct a pie chart and using the above-mentioned
formulas, we can calculate the data.**

**· Step 1:- Write all the
data into a table and add up all the values to get
a total.**

**· Step 2:- To find the values in the form of a percentage
divide each value by the total and multiply by 100.**

**· Step 3:- To find how many degrees for each pie sector we
need, we take a full circle of 360° and use
the formula:-**

** (Frequency/Total Frequency) × 360°**

**· Step 4:- Once all the degrees for creating a pie chart are
calculated, draw a circle (pie chart) using the
calculated measurements with the help of a
protractor.**

**Example: Construct a pie chart to visually display the favorite
fruits of the students in a class based on the
given data:-**

** Mango - 45;
**

**Orange - 30; **

**Plum - 15; **

**Pineapple - 30; **

**Melon - 30**

**Ans.) **

__Step 1:-__ Create a table with the values and get the total.

__Step 2:-__ Find the percentage of each value:

**Mango = (45/150) × 100 = 30% **

**Orange = (30/150) × 100 = 20% **

**Plum =
(15/150) × 100 = 10%**

**Pineapple = (30/150) × 100 = 20% **

**Melon
= (30/150) × 100 = 20%**

__Step 3:-__ Finding
the degree of each pie sector using the formula:-

** (Given data/Total Value of data)
× 360°**

**With
all the above degrees, with the help of a protractor draw a pie chart.
Thus, the pie chart looks like this:-**

__Interpreting Pie Chart -__

**To read or interpret a pie chart, we see if the given
chart is given in percentages or without any
value. If it is given in percentages, the conversion is made accordingly and
interpreted accordingly. Let us look at an example to
understand this better.**