Using Percent Sign in Scale

This is either a bug report or feature request, depending on the answer to this problem.

I looked up the documentation to use the %% in my y-scale. There is a link/reference to http://www.chartjs.org/docs/#scale-title-configuration
Unfortunately, there is no content under this address.

So, someone, please tell me how to do this with the current version (since all examples I found on StackOverflow don’t work anymore).

Thank you!