percent grade

Rise / Run  x 100%

Use the following equation:

$p={100*(c/q)}$

p = percent of questions correct

c = questions answered correctly

q = overall number of questions

For example, if you got 12 questions correct out of 19-

$p = {100*(12/19)}$

$p = {100*(.632)}$

$p = 63.2$

You would get a 63.2%