How to write a formula that avoids dividing by zero

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I am trying to write a formula to get an average for total absence, no shows and regrets; however some cells are zero which returns an error or unparseable message.

Below is the formula I've written that does not work. The problem is with dividing by the [Total Absent] because sometimes it is zero. If it is zero, I want it to default to 1.

=COUNTIF([09/25/23]@row:[06/03/19]@row, ="absent") / [Total Absent]@row IF([Total -Absent]@roW=0, 1).


Will appreciate help with this.

Thanks,

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