What if the 2015 General Election had been proportional representation rather than "first past the post"?

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free number if an answer is giving you trouble. Note that you will lose points if you ask for hints!
What if the 2015 General Election had been proportional representation rather than "first past the post"?
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Fill in the table by calculating the percentage of the votes each party got from the total of 30,374,237. The Conservative percentage has already been calculated. 11,334,920 ÷ 30,374,237 x 100 =37.32%. Then work out the number of seats which would be allocated to each party if the system were proportional.
Party Votes Seats won% of total votes to 2 decimal places 650xvote/totalvote=PR seats (round to nearest seat)
Conservative11,334,92033137.32
Democratic Unionists184,260 8
Green Party1,157,6131
Independent 25,995 1
Labour Party 9,347,326232
Liberal Democrats 2,415,8888
Plaid Cymru181,6943
SDLP99,8093
Sinn Fein 176,2324
Scottish Nationalist Party1,454,43656
UKIP 3,881,129 1
Ulster Unionist 114,935 2
Total 30,374,237650100651

You may have noticed the number of seats now add up to 651! Is this a problem? How should it be resolved?


Which parties would have more seats with proportional representation? Which would have less?

PartyMore or less?
Conservative
Green Party
Labour Party
Liberal Democrats
Scottish Nationalist Party
UKIP

Now check your answers. If you got them right continue to the next exercise.