if I have 25 questions on a quiz and I get a score of 84% how many questions are correct
Just multiply 0.84 times 25. That is, assuming all questions have the same weight; in some exams, some questions may be worth more than others.
20
21 questions out of 25
70% of 25 is 17.5. That is you will pass with 7 (7.5) questions wrong.
25 Questions
6 of them.
Divide how many you got right by 25. Multiply the product by 100.
20
21 questions out of 25
70% of 25 is 17.5. That is you will pass with 7 (7.5) questions wrong.
25 Questions
6 of them.
x/84 = 0.70x = 59 right; that means 84-59 = 25 wrong
22 of them.
Designate the number of correctly answered questions as r. From the problem statement, r = 92 % of 28 = 0.92(28) = 25.76. If partial credit is allowed, this probably means that there were 25 questions completely right and one more that was considered three-fourths right.
25 questions missed
You must get 19 questions right on a 25 question test to earn a score of 75%
30/100*25 =7.5 so you must not get more than 7 questions wrong to score 70%