Find the number of eligable voters in this election, as well as in the 2008 and 2011 elections. Then find out how many people actually voted in each election. What % of people voted? What percentage of these voters voted for each party? How many seats were there available in the House of Commons in each election? How many seats did each of the top 5 parties win? What percentage of seats did they win? Why is there a difference between this percentage and the Popular vote?
Most of this information can be found at election.ca including past elections (under the Main Website tab)