Write an equivalent expression for 1/y - 3/4

We have the expression. To write a equivalent expression, we are going to rewrite the denominator of our expression using its common denominator 4:

Now, notice that we are basically diving 1 by, so we have a division involving fractions, and remember that to divide fractions, we just need to invert the second fraction and multiply:

We can conclude that the equivalent expression of is.

(this is not my answer but someone elses who answered the same problem on here)