Understanding Attendance Calculations

Core Formulas

1. Current Attendance Percentage
Current Attendance = (Present Classes / Total Classes) * 100
2. Daily Calculations During Holidays
New Total Classes = Previous Total + Classes Per Day
New Attended Classes = Previous Attended + (Classes Per Day - Skipped Classes)
New Percentage = (New Attended Classes / New Total Classes) * 100
3. Daily Decrease
Decrease = Previous Percentage - New Percentage

Practical Example

Initial Values
  • Total Classes: 392
  • Present Classes: 318
  • Classes Per Day: 7
  • Holiday Days: 5
Current Attendance = (318/392) * 100 = 81.12%
Holiday Schedule
  • Day 1: 3 classes skipped
  • Day 2: 7 classes skipped
  • Day 3: 7 classes skipped
  • Day 4: 7 classes skipped
  • Day 5: 4 classes skipped

New Total = 392 + 7 = 399
New Attended = 318 + (7 - 3) = 322
New Percentage = (322/399) * 100 = 80.70%
Decrease = 81.12% - 80.70% = 0.42%

New Total = 399 + 7 = 406
New Attended = 322 + (7 - 7) = 322
New Percentage = (322/406) * 100 = 79.31%
Decrease = 80.70% - 79.31% = 1.39%

New Total = 406 + 7 = 413
New Attended = 322 + (7 - 7) = 322
New Percentage = (322/413) * 100 = 77.97%
Decrease = 79.31% - 77.97% = 1.34%

New Total = 413 + 7 = 420
New Attended = 322 + (7 - 7) = 322
New Percentage = (322/420) * 100 = 76.67%
Decrease = 77.97% - 76.67% = 1.30%

New Total = 420 + 7 = 427
New Attended = 322 + (7 - 4) = 325
New Percentage = (325/427) * 100 = 76.11%
Decrease = 76.67% - 76.11% = 0.56%

Final Results

Initial

81.12%

Final

76.11%

Total Decrease

5.01%

Conclusion

Understanding the math behind the results helps you interpret the data more accurately. The decreased percentage gives you an idea of the magnitude of change, while the decrement per day helps you track daily fluctuations. With this knowledge, you can make more informed decisions based on the analysis.