The pie charts illustrate the sport preference of the students at a Malaysian secondary school during two school years.
Overall, the number of students at the school increased significantly from academic year 2004-2005 to 2014-2015. As observed from the graph, the proportion of pupils liking a certain sport changed simultaneously.
At the beginning, in 2004-2005, the majority of the students voted for tennis as their favourite sport, followed closely by football with 30%. On the contrary, the second chart demonstrates that tennis preference decreased drastically from 40% to 15%. Unusually, the percentage of students who favor basketball increased by 20%, while, the percent of football rose by only 10%.
Minor changes of 0%-5% were noted in rugby and swimming sections; however, despite the percent change being negligible, the number of students varied notably. For instance, in 2004-2005, rugby was at 5% making it equivalent to 3700 students, nevertheless, in 2014-2015, that 5% is equal to 4500.