Hello,
Your taxable capital gain is 50% of your proceeds minus your adjusted cost base, however the amount of tax you pay depends on your total income, personal situation and your province of residence. You can find more information here:
https://turbotax.intuit.ca/tips/how-to-reduce-capital-gains-tax-in-canada-6546#:~:text=cottages-,How%20Canada's%20Capital%20Gains%20Tax%20works,and%20your%20province%20of%20residence.
Hope this helps!