Since canned food is close to 80% water, the values are significantly different. That’s why we like to convert the numbers to dry matter to compare them. A canned food with 0.7% ash is definitely with the water, while a canned food with 8.7% ash should be in dry matter or else the food would have to be more than half bone. If you are going to tolerate 9% ash in a dry food, you could divide that by 5 and have an approximate percentage that would be comparable for wet food. It’s not quite the same if your 9% isn’t dry matter, but it’s close enough.
