No - I need to know the percentage margin between the two numbers. I don't know how better to explain it to be honest I don't need to know how much bigger one number is that the other, its the difference (margin) expressed as a percentage that I am interested in. If its any help - using another spreadsheet I have here, I get a percentage margin of 40%, when I use those two numbers (45 and 75). Trouble is that spreadsheet is written in such a way that I cannot just lift out the formula to use in the other document I am creating.