so xn/yn is 4 things multiplied together, in any order: x, n, 1/y, 1/n. (for this, look at 1/y and 1/n as ways to write particular real numbers, not as indicating a division operation. they can be written in other ways without division, like 1/n might be the number 0.5 or 0.7 or some other number).
so you can take any two of the things you want to deal with, like n and 1/n, and multiply them first since order doesn’t matter.
hopefully that gives you some leads. i’m logging off now.