By definition, a fraction has the following form:

Where "a" is the numerator of the fraction and "b" is the denominator.
In this case, you have the following fraction given in the exercise:

You can identify that the numerator of the fraction is 5 and its denominator is 6.
In order to write the fraction given in percent form, you can follow the steps shown below:
1. Divide the numerator 5 by the denominator 6.
2. Multiply the result by 100.
3. Write the percent sign % next to the result.
Then, you get:

The answer is: 83.33%