We're going to use the 'KCF' method to solve this question.
We keep the first fraction,

.
Then, we change the sign to the opposite of it, which would be multiplication.

x
Finally, we flip the last fraction, having the denominator at the top to be the numerator and the numerator at the bottom to be the denominator.

x

At the end, we multiply straight across:

x

=

* Remember, we only use KCF in dividing fractions
So our final answer is

until you simplify it.
= 1

Hope this helps!~