Corridor Modeler Template display - slopes

When I hover over a ditch, my 4:1 foreslope displays at 25%.  So I attempted to adjust by right mouse clicking in the section window of roadway designer, bringing up the "display template" dialog and entered the following, trying to switch it to an alternate slope once it gets too steep to effectively analyze in a percent format.

I have several odd backslopes that aren't as nicely divisible as a 4:1 or 3:1 that I need to get my calculator out in order to decipher. 

I also have the following set under preferences and have tried toggling it between a slope readout and a ratio format to no avail.

can anyone offer any advice?  thanks