Cream contains 21.2% fat. Determine the weight of the cream if it contains 74.2 kg of fat.

The condition says that the cream contains 21.2% fat. In order to determine the mass of cream, if it contains 74.2 kg of fat, we will compose and decide the proportion.

Let’s use the variable x to denote the weight of the cream. And we will also take the weight of the cream as 100%.

Now we can make up the proportion.

x kg – 100%;

74.2 kg – 21.2%.

x / 74.2 = 100 / 21.2;

We are looking for an unknown extreme term of the proportion, for this we divide the product of the middle terms by the known extreme term of the proportion.

x = (74.2 * 100) /21.2 = 7420 / 21.2 = 350 kg cream