NEED MATH HELP! Whats my Overall Grade if my exam is worth 20%?

The fact that your exam grade was virtually identical to your overall grade before that means that your final grade won't be changed by more than a fraction of a percent.

For future reference, the way you would calculate your total grade is:

(83% * 20%) + (84% * 80%) = 83.8%

in the adventure that your very last is nicely worth 20% of your grade, that means that the previous 4 make up 80%. seventy 3 * 80% = fifty 8.4 Passing is 70%, so 70 - fifty 8.4 = 11.6%. which means 20% of the grade on your very last must be 11.6%. In mathematical words, 20% * very last = 11.6% very last = 11.6/20 = fifty 8 you want a fifty 8% on the perfect.