Hi @halkett - You have to use a Vlookup formula with an approximate match and include your ranges in a lookup table.
For instance:
0 - .03 = Scenario 1
.03 - .05 = Scenario 2
.05 - .08 = Scenario 3
.08 and above = Scenario 4
Attached is a spreadsheet of how it works. Your variable (that you change to test the formula) is in A1. The Vlookup formula itself is in B1. Please let me know if this works for you.

Regards,
William