SOLUTION: I correctly answered 27 questions, which was 90% of the questions on the test. How many questions did I not answer correctly?

Algebra ->  Percentage-and-ratio-word-problems -> SOLUTION: I correctly answered 27 questions, which was 90% of the questions on the test. How many questions did I not answer correctly?      Log On


   

Question 446525: I correctly answered 27 questions, which was 90% of the questions on the test. How many questions did I not answer correctly?
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

Let x represent the number of questions on the test

Question states***

  .90x = 27

     x = 27/.9

     x = 30

How many questions did I not answer correctly?

  30 - 27 = 3 answered incorrectly (Note: 10% of 30 )