Karen missed 9 questions on the math exam. If she missed 20% of the questions, how many questions were on the exam all together?

Karen missed 9 of the 45 questions on her mathematics exam. The exam had a total of 45 questions.

Step-by-step explanation:

If Karen missed 9 questions (which equals 20% of the exam), then she completed 80% of the exam.

9 questions = 20%

80% = x

To solve this, we can divide the number of questions missed (9) by 20%, which equals 45. Thus, Karen's test had a total of 45 questions!

There were 45 questions.

Step-by-step explanation:

20 out of a hundred is one fifth. this one fifth of the test is nine questions. we want to find the whole number so we do 9 times 5 to get he other 80% which means 45 questions on the test.