20% of (72 / 96) = 0.15
80 + 20% = 96
96 + 20% = 96 x (1 + (20/100)) = 96 x 1.2 = 115.2
19.2
96
96
76.80
That would be 0.2 X 96 == 19.2 ... OR $19.20
20 questions = 100% 19.2 questions = 96% its impossible to get 96% on a 20 question test. If you don't get 100%, then the best you can get is 95%.
Subtracting 20 percent from 120 gives 120 x (1 - (20/100)) = 120 x 0.8 = 96
It's just multiplication. 70 percent of your total will be 85 20 percent of your total will be 75 10 percent of your total will be 96 (85 x 0.70) + (75 x 0.25) + (96 x 0.10) = YOUR GRADE AVERAGE
15 percent of 96 percent = 0.15 x 96 percent = 14.4 percent