Is there a way to adjust the pipeline stage % values?

Is there a way to adjust the pipeline stage % values?

Good day, 

We recently migrated from SalesFroce, and some stages in the pipeline came through with the import. 
The stages show 0% values, and I was wondering is there a way to adjust this? 

I have searched thoughout the setting portion, and cant find anything. Am I missing something? 

Regards, 
Dylan