What does the fraction mean in an apartment rental listing?

Example: "$750 / 3br - 5 1/2 for rent" When browsing craigslist in my home city of Vancouver, I never see people do this, but when browsing listings for Montreal, most of them have fractions on the end like that. Sometimes it is typed as a decimal (5.5, 2.5, etc). I've determined that it is not... show more Example: "$750 / 3br - 5 1/2 for rent"
When browsing craigslist in my home city of Vancouver, I never see people do this, but when browsing listings for Montreal, most of them have fractions on the end like that. Sometimes it is typed as a decimal (5.5, 2.5, etc). I've determined that it is not describing the number of bedrooms or bathrooms. What does this number mean?
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