Question 547392
example: 100 points for class
75 for everything before final exam and 25 for exam 
.8616(75)=64.62
.82(25)=20.5
if you get a 0% on the test its 64.62/100=64.62%
if you get a 82% on the test its(64.62+20.5)/100=85.12%
if you get a 100% on the test its (64.62+25)/100=89.62%