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Weighted grade = Σ (score × weight) / Σ weights. For a target final grade, solve: required final = (target − current weighted avg × remaining weight) / final weight. Letter grade cutoffs vary by instructor—check your syllabus. GPA points: A=4, B=3, C=2, D=1, F=0; plus/minus grades shift by 0.3. Extra credit above 100% benefits only if the scale allows it.
Percentage
87.0%
Approx. letter (90/80/70/60)
B
Letter cutoffs are a common US-style scale; your school may differ.