Formula where solution has min and max but can be inbetween

For ease of asking this question I have a formulas solution is bound by upper and lower values but can be anywhere inbetween the upper and lower values. How can I write that as programming statement. So far this is what I have :

If I were to change "x" variable to  equal "1", the formulas solution (x/y) would equal "0.5", I would like the program to spit out that answer as well.

Thanks for the help, hope to reciprocate sometime!