A zero denominator example
A2 is 120 and B2 is 0. =A2/B2 returns #DIV/0!. If zero counts should trigger a review, the example formula makes that condition explicit. Put it in C2, then copy to C3. C2 should display Check denominator, while C3 should produce 30. This is a business rule, not a universal replacement for division errors.
Give the assistant enough evidence
Choose Repair formula and paste the complete original formula, including the leading equals sign. State the observed error and the result you expect for one known row. Include relevant headers, ranges, Excel version and whether blanks mean missing data or zero.
Fix syntax separately from logic
A missing closing parenthesis in =SUM(A2:A5 can be repaired to =SUM(A2:A5). That says nothing about whether A2:A5 is the correct business range. Likewise, a formula may calculate successfully while including the wrong month or omitting the last row.
Worked example
A1:B3
| Total | Count |
|---|---|
| 120 | 0 |
| 90 | 3 |
=IF(B2=0,"Check denominator",A2/B2)Teaching example, not a live AI response or an Excel execution record.
Try it step by step
- Keep a copy of the original formula and a small, anonymized failing example.
- Specify the actual error and the intended rule for the edge case.
- Review the returned formula and explanation before replacing your original.
- Check a normal row, an empty row, a zero value and a missing lookup key where relevant.
Before you rely on the result
- IFERROR can hide #REF! and other defects as well as expected missing values. Use it intentionally.
- Do not change every comma to a semicolon inside quoted text; only argument separators depend on your settings.
- DevByteClue performs basic checks but does not execute the formula in Excel or certify the result.