Explanation:
A pie chart is a circular graph that represents data in slices. Each slice represents a proportion or percentage of the whole data set. Pie charts are commonly used to show relative sizes of different data sets or to compare parts of a whole.

Example:
Suppose we have data on the sales of different products in a store for a particular month. We can represent this data using a pie chart as follows:

- Product A: 30%
- Product B: 20%
- Product C: 15%
- Product D: 10%
- Product E: 25%

The entire circle represents the total sales for the month, which is 100%. Each slice represents the percentage of sales for each product. The size of each slice is proportional to the percentage it represents.

Advantages of using a pie chart:

- Easy to understand: pie charts are easy to read and understand since they use a visual representation of data.
- Shows proportions: pie charts are useful when comparing parts of a whole, as they show the proportion of each part relative to the whole.
- Attractive: pie charts are visually appealing and can be used to make presentations more interesting.

Disadvantages of using a pie chart:

- Limited data: pie charts are not suitable for large data sets as they can become cluttered and difficult to read.
- Difficult to compare: it can be difficult to compare the sizes of different slices in a pie chart, especially when the slices are similar in size.
- Misleading: pie charts can be misleading if the slices are not accurately sized or if the data is not represented correctly.