# Percentage Bar Diagrams : Diagrammatic and Graphical Representation of Data

## Reference Notes Unit: Statistics | Economics Types of Bar Diagram Management: Class 11

Percentage Bar Diagrams:
When data should be compared between group and the variable is composed of various interrelated components, it is appropriate to present these values by percentage bar diagrams. In other words, when the relative proportions of components of a bar are more important than their absolute values, then each bar can be constructed with the same size to represent 100 percent. The component values are then expressed in terms of percentage of the total to obtain the necessary length for each of these in the full length of the bars. The other rules regarding the shades, index and weight are same as in multiple bar diagram.

Example:
Expenditure of a family of the year 2010 is given. Represent the data by percentage bar diagram.

 Items Expenditure (Rs.) Cloths Food Education Health Miscellaneous 500 800 400 200 100

Solution:

 Items Expenditure (In percentage) Cloths 500/2000*100% = 25 % Food 800/2000*100%=40 % Education 400/2000*100%=20 % Health 200/2000*100%=10 % Miscellaneous 100/2000*100% =5 %

Above diagram is the example of Percentage Bar Diagram.

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