Pie charts aren&#x27;t perfect but are useful when applied correctly.<p>Two great things about pie charts:<p>1. From the shape you can tell you are looking portions of a whole. For example, a pie chart of market shares shows all businesses in the category.<p>2. You can easily guess the proportion of the segments relative to each other. For example, in this chart <a href="http:&#x2F;&#x2F;www.liv.ac.uk&#x2F;~cll&#x2F;lskills&#x2F;WN&#x2F;pie%20chart1.gif" rel="nofollow">http:&#x2F;&#x2F;www.liv.ac.uk&#x2F;~cll&#x2F;lskills&#x2F;WN&#x2F;pie%20chart1.gif</a> you can tell that football and rugby make up half the total and cricket, tennis, athletics, and other make up the other half.