ClarityHow to use this tool
- Enter classes attended, classes held, target attendance.
- Select Calculate to view the result.
- Check the method and assumptions below before using the result.
Input reference and sample values
Use the units and choices shown for each field. Sample values are provided for practice, not as recommendations.
| Input | Format and units | Sample |
|---|---|---|
| Classes attended | Whole numbers only. Zero or positive. Maximum: 100000. | 30 |
| Classes held | Whole numbers only. Minimum: 1. Maximum: 100000. | 40 |
| Target attendance | Numeric value. Unit: %. Minimum: 0.000001. Maximum: 99.999999. | 80 |
Result for these sample inputs
10 classes
Select Try the example in the form to load these values and calculate them again. This replaces the current form inputs. Compare the result with the method and worked explanation below.
The method, explained
Needed = max(0, ceil[(target fraction × total − attended)/(1 − target fraction)]).
Using classes attended = 30, classes held = 40, target attendance = 80 %, the result is 10 classes. Change these example inputs to match your task; use the method above to check each step.
What to keep in mind
Assumes you attend every additional class and no past records change. Check the grading or scheduling rules used by your institution. The stated mathematical convention may differ from its policy.
Methodology maintained by ClarityKit. How these tools are built and checked.