As you know you cannot divide by zero
Ideally where you are dividing by zero there should be infinite Growth
However a better technique is to reset that to either 0 or 100%
for 0%
C2: =IFERROR(B2/A2,0)
D2: =IFERROR((B2-A2)/A2,0)
Copy both down
or for 100%
C2: =IFERROR(B2/A2,1)
D2: =IFERROR((B2-A2)/A2,1)
Copy both down