A bag of potting soil is 1/4 Peat Moss. What fraction represents the part that is dirt?

To determine the fraction of the bag of potting soil that is dirt, it is essential to recognize what portion of the mixture is not peat moss. Given that the potting soil is 1/4 peat moss, it follows that the remainder of the bag must consist of dirt and possibly other components.

Since the whole bag can be considered as a whole or 1 (representing 100% of the contents), the fraction that represents the part of the bag that is not peat moss is calculated by subtracting the fraction of peat moss from the whole:

1 (the whole bag) - 1/4 (the portion that is peat moss) = 3/4.

This means that 3/4 of the potting soil is dirt, thus making that the correct answer. In this context, the other options do not represent the remaining part accurately, as they either indicate fractions that are less than what is actually dirt or suggest that no dirt is present when in fact a significant portion is dirt.