On a dry matter basis, what percentage of water does feed contain?

When discussing feed on a dry matter basis, it is important to understand that "dry matter" refers to the part of the feed that does not contain water. Therefore, when feed is analyzed on a dry matter basis, the percentage of water contained in the feed is effectively considered to be zero. This is because dry matter is defined as the material remaining after all the water has been removed; thus, in this specific context, the water content on a dry matter basis is stated as zero percent.

Options that suggest a percentage of water, such as 10%, 25%, and 50%, would imply that there is still water present in the feed when evaluated in terms of dry matter, which contradicts the definition of dry matter itself. For this reason, the correct understanding is that on a dry matter basis, one acknowledges that the water content is not included in the measurement, leading to the conclusion that the percentage of water is indeed zero percent.