Twenty seven would be 135% of 20.
Twenty percent of 27 would be 74%.
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20%/100% * 135 = 0.2*135 = 27
It is: 135% = 27/20
To achieve an 80 percent score on a 27-question test, you would need to answer 80% of the questions correctly. This means you can get 20% of the questions wrong. To calculate the number of questions you can miss, multiply 27 by 0.20 (20%) to get 5.4. Since you can't have a fraction of a question, you would need to round down to 5 questions. Therefore, you can miss 5 questions out of 27 to achieve an 80 percent score.
27%
20 percent of 80 percent = 0.16 or 16%