Fractions

I'm new to Igor. I want to make a calculation based on the previous cell in the wave. An example would be decimal percentage (0.01, 0.02, 0.03...) and fill down to row 99 til the value is 1. How would I do this in Igor? It seems simple, but I can't figure it out.
Thanks
chemgoof wrote:
Nevermind. Make/D /N=100 percent=(p+1)/100. Found out 0 is first cell.


Note, all indexing is zero based in Igor, like C and Python. Also, p refers to the row number, so in this case a cells value is not dependent on the preceding cell (although this can be done).