Question

comparing lactose percentage between whole milk and powdered milk

Answer 1

lactose percentage. In milk is more than inilk powder 13:6

Answer 2

Milk is pretty much milk, no matter whether it is whole, low-fat, or skim (aka nonfat). All of it contains approximately 5.0% lactose. It could be a bit more or less. Milk depends on the cows it comes from, how the cows are fed, whether milk from one batch has been mixed with another and so on.

Most dry milks, including nonfat dry milk, instant nonfat dry milk, and dry buttermilk, run a good 50% lactose. Dry whole milk, because of its higher fat content, is a bit less, but still has 36% to 38%

Regular Whole Milk Range  3.7-5.1%                Average  4.8%

Nonfat Dry Milk        Range   49.0-52.3%        Average   51.3%

Dry Whole Milk        Range    36.0-38.5%        Average  37.5%