What is the best way to avoid `DIV` errors when working with potentially missing data?

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Grade: Education Subject: Support
What is the best way to avoid `DIV` errors when working with potentially missing data?
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Use `IFERROR()` or `IF()` functions combined with `ISBLANK()` to handle missing values gracefully. For instance, `=IF(ISBLANK(B1), 0, A1/B1)` handles both zero and blank values in B1, displaying 0 in either case.