Final answer:
Brandon and the pharmacy have both completed an equal portion of the batch, which is 6/9 equivalent to 2/3. There are no additional prescriptions that the pharmacy has left to review beyond what Brandon has filled. If the question aims to find the remaining portion of the batch yet to be reviewed, it is 3/9, equivalent to 1/3, of the batch.
Step-by-step explanation:
The subject of the question is determining how many more prescriptions at the pharmacy have left to review. Since Brandon has filled 6/9 of a batch of prescriptions, and the pharmacy has reviewed 2/3 of the batch, we need to compare these two fractions. To compare them, they must have the same denominator. The fraction 2/3 can be converted to 6/9 by multiplying the numerator and the denominator by 3. This gives us:
2/3 = 2 × 3 / 3 × 3 = 6/9
Now, since both fractions have the same denominator, we can easily compare them. Brandon has filled the same amount as the pharmacy has reviewed (6/9).
The answer to the question 'How many more prescriptions at the pharmacy has left a review?' is therefore none, since both the filled and reviewed fractions are the same. However, if the question is asking how many prescriptions are left to be reviewed, then it's 3/9, which is equivalent to 1/3, since 6/9 of the batch is filled and reviewed.