Plum during drying loses 0.7 of its mass. How many kilograms of plums do you need to collect to get 4.8 kg of dried plums?

To solve this problem, remember, in order to find the number by its part, expressed as a fraction, you need to divide this number by a fraction. After the plum has lost 0.7 of its mass, it will weigh:
1-0.7 = 0.3 of its mass.
Knowing that 0.3 part of a plum is 4.8 kg of dried plum, we calculate the amount of fresh plum.
4.8 / 0.3 = 16 kg.
Answer: 16 kilograms.