“d”
when determining the variables and how much should be on top or bottom, look at the exponents!
you subtract the exponents with the ones of the same variables and which ever has more, stats there
so, x^4/x^5 the x on the bottom has one more than top leaving the remainder at the bottom
the y is the same; 2-1 and the one left is the top with more
leaving the answer -8y/x