Question

When mushrooms are dried, they lose 80 percent of their mass. What weight of mushrooms must be picked to get 1 kg of dry mushrooms?

Answer 1

5 mushrooms

Explanation:

Answer 2

We need to start with 5 kg of mushrooms

Explanation:

The total of the dried mushrooms = mushrooms * percentage of weight kept

percentage of weight kept = 1- 80% = 20 %

We want 1 kg of dried mushrooms. Substitute in what we know

1 kg = mushrooms * 20%

1 kg = mushrooms * .2

Divide each side by .2

1 /.2 = mushroom *.2 /.2

5 kg = mushrooms

We need to start with 5 kg of mushrooms