Test Grade Calculator

This turns a test result into a percentage and a letter grade. Enter the number of questions and how many were answered wrong, or enter points earned out of points possible with an optional flat curve, and pick which cut off table the letter should come from. Along with the percentage it shows what one more right or wrong answer would do to the score and how many correct answers the next letter up needs. The percentage is arithmetic, but the letter is school policy, so the scale in use is printed with the answer and a syllabus that cuts an A somewhere else overrides it.