It works now except when its 70% or .70. for some reason it wont ouput that as C-
69, 71, 72 work just not 70

Code:
  Select Case endTotal
            Case 0.0 To 0.59
                grade = "F"
            Case 0.6 To 0.62
                grade = "D-"
            Case 0.63 To 0.66
                grade = "D"
            Case 0.67 To 0.69
                grade = "D+"
            Case 0.7 To 0.72
                grade = "C-"
            Case 0.73 To 0.76
                grade = "C"
            Case 0.77 To 0.79
                grade = "C+"
            Case 0.8 To 0.82
                grade = "B-"
            Case 0.83 To 0.86
                grade = "B"
            Case 0.87 To 0.89
                grade = "B+"
            Case 0.9 To 0.93
                grade = "A-"
            Case 0.94 To 1
                grade = "A"


        End Select
        letterGradeLabel.Text = grade