When you dry mushrooms,they lose 72% of there wieght. What weight of fresh mushrooms do you need in order to get 12.25 pounds of dried mushrooms?
You need 12.25/0.72 = 17.01 pounds of dried mushrooms.
Since they lose 72% of their weight, they retain only 28% of their weight.
If x is the total weight of fresh mushrooms: 0.28 · x = 12.25
---> x = 12.25 / 0.28 ---> x = 43.75 pounds of fresh mushrooms