There is either a "CU" or "AG" followed by a space and a %
What we want is the data after the space through the %
The following shows how to do this step by step with only one formula per cell, This could be combined into a single formula, but I think this is easier for someone to follow or modify
assumes the data is in A1,A2,...
in C1:
=+IFERROR(FIND("AG",A1),FIND("CU",A1))
this will get the location of the AG or CU
in D1:
=+FIND(" ",A1,1+C1)
this gets the location of the space by looking for a space starting past the previous found AG or CU.
in E1:
=+FIND("%",A1)
this finds the %
in F1:
=+MID(A1,D1+1,E1-D1)
this pulls out the data by using the location of the space and the location of the %