85% of 140 test tubes= 85% * 140= 0.85 * 140= 119 test tubes
what you do is you divide 100 by the amount the test was out of then times your answer by your mark
20-3 = 17 and 17/20 = 85/100 = .85 or 85%. Percent is a ratio per cent or 100. Multiplying both the 20 and the 17 by 5 will make the denominator 100 and the percent sought after.
40 questions
If there are 85 questions, a passing grade of 80% would be 68 correct answers.
The answer depends entirely on the test and the individual taking it. One some tests, 85% is incredibly good; one other tests it is very poor. Likewise 85% might be an excellent mark for me on some test, but a failing mark for an expert in the subject.
85% of 140 test tubes= 85% * 140= 0.85 * 140= 119 test tubes
That depends whether 85 corresponds to your percentage, or your mark. If you get 85 marks on a 90 question test, then you have missed five questions.
(77+83+89+86+x)/5=85 (335+x)/5=85 (335+x)=85*5 335+x=425 x=425-335 x=90 He must get 90% on his fifth test to average 85%.
what you do is you divide 100 by the amount the test was out of then times your answer by your mark
20-3 = 17 and 17/20 = 85/100 = .85 or 85%. Percent is a ratio per cent or 100. Multiplying both the 20 and the 17 by 5 will make the denominator 100 and the percent sought after.
your average is currently 80 now if you get a 100 on the next test it will become a 90
No more than 17 of them.
40 questions
85 percent = 0.85
85 percent of 75 is 63.75
If you miss 6 questions you will get an 85% on a 40 question test. To calculate various test score questions, simply divide the number of correct answers by the number of total questions. For example, on your particular question, if you divide 34 (the number of correct answers) by 40 (the total number of test questions), the answer is .85, or 85%.