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koit
 
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Default Preventing errors


Hi all

I have a s/sheet in the middle of being set up.

I need to create a formula based on columns E, G & I. I need Column K
to average the percentage of those previous 3 columns.

Column I will be presented in a number format (1-5) these are converted
to percentages (see field K18 for an example of what each number is
converted to)

The problem I'm facing is this.........I want the formula to be pretty
robust so that if for any reason, columns E, G or I (or any combination
of the 3) are not completed, the average percentage in column K is still
calculated.

For example, if I populate column E18 with 100%, G18 leave blank and
I18 insert a 3, column K appears as 100%. This is clearly incorrect as
the average of 100% and 50% (where 3 = 50%) should be 75% !!!

Any help please ?


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