I mean, I know hamburger meat shrinks somewhat when you cook it, but I had no idea that over seventy percent of it was just plain old dihydrogen monoxide.
That means even a cooked hamburger must still be more than half water. Ye gads, I’ll never have to drink again!
A typical human is 60 - 70% water. I doubt cows area all that different.
So unless you completely dehydrate the meat once it’s butchered, it’s still going to have most of that water still in it. Keep in mind that most of that water is inside the cells, so it’s not like there is just a bunch of water floating around in the meat.
No; 2% milk means that it is 2% fat by weight; a cup of 2% milk (about 250 grams) will have 5 grams of fat, 12 grams of carbohydrates and 8 grams of protein, plus another gram or two for vitamins and minerals, for a water content of about 90%.
That sounds about right. Jerky recipes range from a finishing weight of 1/2 - 1/4 of the starting weight, so over 70% water content does not sound incorrect.