N/A Column leads to #DIVIDE BY ZERO

I'm working on an onboarding tracker where I'm using an "N/A" checkbox in order not to count the modules that individuals aren't required to take. I'm using another checkbox to represent "Done" and the percentage complete - =COUNTIF(CHILDREN(Done16), 1) / COUNTIF(CHILDREN([N/A]16), 0)

If an entire module is chosen as "N/A" the result is #DIVIDE BY ZERO. Is there a way to alter the formula to not divide by a number?

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L_123

=COUNTIF(CHILDREN(Done16), 1) / if(COUNTIF(CHILDREN([N/A]16), 0) = 0,1,COUNTIF(CHILDREN([N/A]16), 0))

You cannot divide by zero. If there aren't any checked N/A, then your denominator is zero and you have an incorrect formula. You just need to check the case that the denominator is 0 and post a 1 instead.

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