The butter is 0.25 mass of sour cream. How many kilograms of butter are in 3.8 sour cream?

In order to get the answer to this problem, we need to convert 0.25 to an ordinary fraction, so that it is easier to calculate the result 0.25 – ¼.

Now we know that out of 4 parts of sour cream, there will be only 1 part of butter.

To find the number of butter, take 3.8 kilograms of sour cream and divide it into 4 parts, so we can find what the butter will be equal to.

3.8: 4 = 0.95 kg = 950 grams.

Answer: 0.95 kilograms of oil.