Excel Formulas
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Letter Grade Conversion
Here is a formula for converting a percentage to a letter grade. Here, the percentage score is in column Z (row 2), and this formula would be pasted into the cell to the immediate right (column AA):
=IF(Z2>=90,"A",IF(Z2>=85,"A-",IF(Z2>=80,"B+",IF(Z2>=75,"B",IF(Z2>=70,"B-",IF(Z2>=65,"C+",IF(Z2>=60,"C",IF(Z2>=55,"C-",IF(Z2>=50,"D","F")))))))))