Question 547173
example: 100 points for class
80 for everything before final exam and 20 for exam 
.8(80)=64
((64+x)/100)100=80%
64+x=80
16=x
16/20=80%
so u need an 80% grade to keep an 80%in the class
since you gave no values i cannot determin the exact score but basically its {{{.8(T)=G}}}
.8 times total points = amount of points needed on test.