Matt has answered 20 over 25 of the questions on a test. what percentage of the test question has matt answered

So,

Matt answered 20 out of 25 questions.


We need to get the denominator to be 100.  We can do that by multiplying the fraction by a form of 1.


From here, it should be easy to see that Matt has answered 80% of his test.

21/2 or 5/2