There are two pints every quarter.
So let's convert pints to quarter

There 4 1/2 pint is to 9/4 quarter.
Hope that helps!
p.s. look at my diagram to help you remember
A. Surveying the students about their favorite type of math problem.
and
C. Sampling water for contaminants
If you add that together you get 28
31/18 is the answer.
To solve, find the common denominator. In this case, I used 54. You need to multiply each fraction to get 54 on the denominator of both.