Well it's a little more complicated than that. Canned foods typically contain a lot more water than dry foods so in effect the canned food analysis requires some conversion to make an accurate comparison.
Without a measuring method known as dry matter basis, it can be very difficult to compare dog foods.
That’s because pet food companies report the nutrient content of their products using something known as Guaranteed Analysis.
In essence, Guaranteed Analysis is the pet food industry’s version of the Nutrition Facts “panel” printed on every package of human food sold in the U.S. and Canada.
The purpose of the Guaranteed Analysis panel is to make it easy for consumers to compare four critical nutrients…
However, when used alone, these numbers can be misleading.
That’s because the system used for reporting the percentages fails to consider the widely varying amount of water present in different types of foods. And this can be a critical factor when comparing moist foods — like canned or raw products — with dry kibbles.
Even the Food and Drug Administration warns of the importance of paying attention to this issue on its own website…1
“To make meaningful comparisons of nutrient levels between a canned and dry product, they should be expressed on the same moisture basis.”
Dry Matter Basis Explained ….