# As a result of processing, the weight of the part has decreased from 2.5 kg to 2.2 kg.

September 12, 2021 | education

| **As a result of processing, the weight of the part has decreased from 2.5 kg to 2.2 kg. How many percent has the weight of the part decreased?**

1) We take the mass of the part before processing as 100%.

2) Let x% be the mass of the part after processing.

3) Then let’s make a record:

2.5 kg – 100%,

2.2 kg – x%.

4) Let’s compose and solve the proportion:

2.5: 2.2 = 100: x.

According to the main property of the proportion, you can write:

2.5 * x = 2.2 * 100;

2.5x = 220;

x = 220: 2.5;

x = 88.

5) We get that the mass of the part after processing will be 88% of its initial mass.

6) Let’s calculate by what percentage the mass of the part will be reduced:

100 – 88 = 12%.

Answer: The weight of the part after processing will decrease by 12%.

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