A1 is this month total
B1 is last months total
C1 is the difference, =A1-B1
This much I got
D1 is the difference in percentage, I use =(A1-B1)/B1 and I get my % in
black or (red) which is fine but now the problem

There are times we don't always handle a certain item so some months will
have a zero in either this month or last months calc and my % is all messed
up i get this #DIV/0 I think this means that you can not divide by zero but
how do I get around this.