If 1mm=100mm, then we make it displayed 1/100 at title.
Here is an example.
But in Revit, it appears automatically 1:100.
And sometimes, multiple scale display is necessary, like this.
If you want to change scale text like above or any other style, just use custom scale and apply custom Display Name with it.
And as a side effect, this scale text will affect the sheet which includes the view.