In 2015, the democratic deficit was 50.6. This means that out of our 338 seat Parliament, 50.6 seats were occupied by a party (in this case, all Liberal seats) which were in excess of the seats they would be entitled to under a proportional system.
In short, the first past the post system awarded the Liberal party 50.6 more seats than they deserved based on the popular vote. This represents about 15% of the seats in the House of Commons.
In some regions of the country, both the Conservative Party and the NDP received more seats than they would have under a proportional system. However, they lost more seats in other regions than they would have.
It should be noted that instead of a majority Liberal government as was elected, there would have been a minority government. The Liberals would have been given the opportunity to form government through effective collaboration with other parties in the House.
Provincial results are given below in alphabetical order. (Note: Territorial outcomes are not changed under SMMP)