The following data shows the expenditure of a person on different items during a month.

We know:

Central angle of a component = (component value/sum of component values ×">× 360)

Here, total amount = Rs 10800

Thus, the central angle for each component can be calculated as follows: 

Total : 10800 (in Rs)

Now, the pie chat representing the given data can be constructed by following the steps below:

Step 1 : Draw circle of an appropriate radius.

Step 2 : Draw a vertical radius of the circle drawn in step 1.

Step 3 : Choose the largest central angle. Here, the largest central angle is 90o. Draw a sector with the central angle 90o in such a way that one radius coincides with the radius drawn in step 2 and another radius is in its counter clockwise direction.

Step 4 : Construct other sectors representing other items in the clockwise direction in descending order of magnitudes of their central angles.
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Step 5 : Shade the sectors with different colours and label them, as shown as in the figure below.​​