The alloy contains 16% zinc alloy, how many kilograms of zinc are contained in 300 kg of the alloy.

From the condition we know that the alloy contains 16% zinc. In order to find how many kilograms of zinc are contained in 300 kg of alloy, we will compose and solve the proportion.

Let’s define the weight of the entire alloy as 100%. And using the variable x kg, we denote the weight of zinc in the alloy.

We make the proportion.

300 kg – 100%;

x kg – 16%.

300 / x = 100/16;

We are looking for the unknown middle term of the proportion. In order to find the unknown average term of the proportion, we must divide the product of the extreme terms by the known average.

x = (300 * 16) / 100 = 4800/100 = 48 kg of zinc in 300 kg of alloy