Your grade would be 72 if you got 45/62
8/13 right = 62 %
82.4% or B
88% or B+
a 62% is a D-
62 + 17 = 79
(5/62)*100 = 8.07% wrong.
17/19 = 89% = B+
62% or D-
d-
62%
It is approx 62%. As to the grade, the answer will depend on any normalisation and grade boundaries.
107