Hi John,
I did mention what I am trying to do in my prior post.
the exactly formula i am using in a cell C1 is:
=IF(AND(ISBLANK(A1),ISBLANK(B1)),"---"),IF(AND(ISNumber(A1), ISBLANK(B1)),"100%",IF(AND(ISNUMB
ER(A1),ISNUMBER(B1)),(A1-B1)/B1,"")))
since A1, B1 have formula, the ISBLANK...