## The problem

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I need help understanding this problem

## Answer provided by our tutors

You want to simplify and expression. To do so, we need to reduce the fraction to the lowest terms.

First, we get rid of the negative exponents by using the rule:

Then, multiplication is performed and then we divide in the numerator and in the denominator to get the final result

You can obtain an explanation for any step by clicking on it. Please note that you cannot click on the very first expression, which is the original problem. Quite often, several transformations will be performed within the same step. Use the explanation navigation buttons to step through all of them: