Let a variable stand for the nonzero number. It has to not be zero because it's on the bottom of a fraction or it is the "divided by" guy in a division. It is division because quotient means you are dividing.
So 9 is on top (or in front)
5x is on the bottom (or the second term)
9/5x
also 9÷5x but I think the / notation is preferred in middle school, high school and college for algebra.
Also the variable can be almost any letter, like 9/5n or 9/5s is just as good.
