What makes you think that the minus sign is wrong? The formula gives the
right result if the values are integer and the "between" is intended to be
inclusive.
It would be better to use =COUNTIF(A:A,"<=129")-COUNTIF(A:A,"<120") in case
the numbers are not necessarily integer.
Change it to =COUNTIF(A:A,"<129")-COUNTIF(A:A,"<=120") if "between" is
intended to be exclusive, not inclusive.
I'm not sure what was wrong. I was unable to get the counts to come out
properly. I did get the "sumproduct" formula to work. I would like to know
why the other formula was not working, but it wasn't.
We may need a bit more information than "was not working".
What values did you have in the cells, which formula were you using, what
answer did you get, and what answer did you expect?