If you are looking to create a formula so that if zero show nothing we recommend you use the IF function. To see how to use the IF function watch the IF video tutorial.
In this case if you want a reference to a blank cell (e.g. in cell C2 below) you would get Excel to test whether cell A2 is blank ( A2=”” with the inverted commas next to each other and no space in between). If this is true it must return “” (again no space in between).
So the formula for cell C2 would be