Can someone please help me figure out my grade?

I have an 89% in my class as of now, this includes quizzes,test, homework and this average counts as 80% of my grade





my final is coming up and it's worth 20% of my grade. What would my average be if I get a 95% on the final?Can someone please help me figure out my grade?
If your final is 20% of your grade....





89 X 4= 356


95 X 1= 95


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451/5= 90.2Can someone please help me figure out my grade?
The part that is missing is what are the total points possible? Assume 100 points are possible then:





80 points (80% of 100 possible points) * 89% = 71.2 points





20 points (20% of 100 possible points) * 95% = 19 points





71.2 + 19 = 90.2 points out of 100 possible, so:





90.2%
Let's hope it's not math...
90.2%
um, ask your math teacher for some help.