try

=IF(ISBLANK(A2),"",IF(A2<0.3,"",A2-A1))

or in a neater format

=IF(OR(ISBLANK(A2),A2<0.3),"",A2-A1)

Hope this helps
Rowan

"Jonibenj" wrote:

>
> I have the following set-up with 3 cells:
>
> A1 - a target percentage value (30.00%)
>
> A2 - the actual value
>
> A3 - the deviation
>
> Each cell is formatted for percentages. I have inserted the following
> formula into A3:
>
> =IF(ISBLANK(A2),"",IF(A2<30,"",A2-A1)
>
> The formula is supposed to do either of three things:
>
> 1. If there is no value in A2, leave A3 blank.
> 2. If the actual percentage is 30% or lower, leave A3 blank.
> 3. If the actual percentage is over 30%, calculate the deviation from
> the standard.
>
> However, The fromula is not behaving! No matter what I do, the A3 cell
> remains blank! What have I done wrong???
>
> Jonathan.
>
>
> --
> Jonibenj
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