The given expression is

Thus, in verbal form, we can express it as one eighth of a number.
Answer:
We have the following details:
Confidence level = 99%. Hence, the critical value at a 0.01 significance level is provided below:

The margin of error is mentioned in the question as:

Since we lack information about the previous proportion, we need to assume
.
Therefore, the required sample size is:




Thus, it requires 664 sample observations.