Mathematics & Education Formula • Published on July 30, 2026 • Last updated August 09, 2026
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Total class attendance ratio expressed as a percentage
Total number of classes or lectures present/attended
Total number of classes or lectures conducted by university/school
The attendance percentage formula calculates the proportion of classes attended out of total classes conducted. To maintain a required target criteria (such as 75%), bunk guidance calculates maximum skippable lectures $B = \lfloor \frac{N_{\text{attended}} - T \times N_{\text{total}}}{T} \rfloor$, while recovery guidance calculates required consecutive lectures $R = \lceil \frac{T \times N_{\text{total}} - N_{\text{attended}}}{1 - T} \rceil$.
You can bunk until your attendance drops to your target criteria (e.g. 75%). Use the formula B = (Attended - 0.75 * Total) / 0.75.
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