Could someone remind me please how to work out the protein level of a tinned food as dry matter-eg if a food contains 70% moisture and 14% protein how do I compare it to protein levels in a dry food? (I make it 46% but is this right-I think I'm just being a bit thick here!).

I would get 46.6 % as well

formula I use =   % protein  / % dry matter  (14/30 = 46.6%)

Karen

The way I do it;

To correctly calculate the protein content in any food (wet or dry) you should first remove the moisture content from the equation. So for example's sake Naturediet is 75% moisture; then you'd need to look at the protein %age on the pack; Naturediet varies from 7 - 12% depending on the variety; divide the %age of protein by the dry matter and multiply by 100 this will give you the ACTUAL protein %age which is as follows:

7/25 x 100 = 28% protein,
10/25 x 100 = 40% protein,
12/25 x 100 = 48% protein

HTH?

Thanks,klb!

And thanks as well huskygal.