If your attendance has dropped below the required minimum, the useful question is how many classes in a row you must attend to climb back above it. This tool solves exactly that from your current attended and total counts.
The formula
You need enough consecutive attended classes so the new ratio meets the requirement. If r is the required fraction, solve (attended + x) ÷ (total + x) ≥ r:
Attend x in a row until (attended + x) ÷ (total + x) ≥ required%
x ≥ (r × total − attended) ÷ (1 − r)
For example, with 40 attended out of 60 held and a 75% requirement (r = 0.75):
- Current attendance = 40 ÷ 60 = 66.67%
- x ≥ (0.75 × 60 − 40) ÷ (1 − 0.75) = (45 − 40) ÷ 0.25 = 20 classes
- Check: (40 + 20) ÷ (60 + 20) = 60 ÷ 80 = 75%
When this helps
- Recovering shortfall — see the exact number of classes to attend before an exam cut-off.
- Planning ahead — decide whether recovery is realistic given the classes left.
- Staying on track — set a concrete target instead of guessing.
A caveat on the assumption
The result assumes you attend every one of the next x classes without a single miss — miss any and the maths resets, requiring more. At a required 100% recovery is impossible once you have missed a class, and the tool says so. To check your current standing first, use the attendance percentage calculator, and for exam scores the marks percentage calculator helps. Explore the CodeBegun programs to build job-ready skills alongside your studies.