Percentage Component Bar Chart

Sub-divided bar chart may be drawn on percentage basis. To draw sub-divided bar chart on percentage basis, we express each component as the percentage of its respective total. In drawing percentage bar chart, bars of length equal to 100 for each class are drawn at first step and sub-divided in the proportion of the percentage of their component in the second step. The diagram so obtained is called percentage component bar chart or percentage staked bar chart. This type of chart is useful to make comparison in components holding the difference of total constant.

Example:

The table below shows the quantity in hundred kgs of Wheat, Barley and Oats produced on a certain form during the years 1991 to 1994.

Years
Wheat
Barley
Oats
1991
34
18
27
1992
43
14
24
1993
43
16
27
1994
45
13
34
 
 
 
 

Construct a percentage component bar chart to illustrate this data.

Solution:

Necessary computations for the construction of percentage bar chart given below:

Item
1991
1992
1993
1994
 
%
Cum%
%
Cum%
%
Cum%
%
Cum%
Wheat
43.0
43.0
53.1
53.1
50.0
50.0
48.9
48.9
Barley
22.8
65.8
17.3
70.4
18.6
68.6
14.1
63.0
Oats
34.2
100
29.6
100
31.4
100
37.0
100
Total
100
 
100
 
100
 
100
 

 

  • % indicates Percentage of each item
  • Cum% indicates the cumulative percentage.
Percentage Component Bar Chart

Percentage Component Bar Chart