I am having a hard time figuring this out! Can someone please help explain it to me? I think I am making it harder than it needs to be, but I am just not getting it. I am to "simplify and compare equivalent expressions written both in radical form and with rational (fractional) exponents". Thank you so much in advance!

My problems are:

9^1/4 divided by 9^3/4

and

(2a^1/2 divided by b^1/3) all ^2