Hi Hendrik,

To add the plus symbol to positive percentage, you can use the IF function in Excel. Here's how:

1. Start by typing your formula in a cell:
   Code:

   =(A1/A2)-1

2. Click on the cell where you want to display the result.
3. Type the following formula:
   Code:

   =IF((A1/A2)-1=0,"+"&TEXT((A1/A2)-1,"0%"),TEXT((A1/A2)-1,"0%"))

4. Press Enter.

What this formula does is check if the result of your original formula is greater than or equal to zero. If it is, it adds a plus sign to the beginning of the percentage using the "&" symbol to concatenate the plus sign with the percentage. If the result is negative, it simply displays the percentage with no plus sign.

Let me know if you have any further questions.