30/100*25 =7.5 so you must not get more than 7 questions wrong to score 70%
Your score would be 90.91%
If you miss 28 questions out of 70, your score would be 60%
In order to score exactly 70% on a test with exactly 70 questions ... if every questionis worth the same credit ... you have to get 21answers wrong. You can do it.
Your score on a test is based on the number of questions answered correctly, so the score is 35/47 = about 75%. The letter grade for that score is completely the teacher's decision.
.30 x 170 = 51 wrong
You can get up to 150 questions wrong.
A test score of "90" represents the percentage of correct questions. Multiply this percentage by the total number of questions and you will have the number of questions correctly answered. Subtract this from the total to find answers wrong. 90% of 40 questions = .90 x 40 = 36 questions right. 40-36 = 4 answers wrong.
To figure out your score on a test, you just have to divide the number of answers you got right by the number of total questions there were. In this case, 65 divided by 73= .89 or 89%.