When dried, mushrooms lose 79% of their mass. How much dried mushrooms

When dried, mushrooms lose 79% of their mass. How much dried mushrooms will turn out if you take 20 kg of fresh ones.

20 kilograms of mushrooms is one hundred percent.
Let’s calculate how many kilograms the mushrooms will lose during drying: 20 * 79/100 = 15.8 kg.
Let’s find how many kilograms of mushrooms will be obtained after drying. To do this, subtract the mass that the mushrooms lose during drying from the initial mass of mushrooms: 20 – 15.8 = 4.2 kg.
Answer: after drying 20 kg of mushrooms, you get 4.2 kg.