The alloy contains 15% copper. What is the weight of the alloy if there is 24g copper in it?

It is known from the condition that the alloy contains 15% copper. In order to find what is the mass of the alloy if there is 24 g of copper in it, we will compose and solve the proportion.

Let’s denote the weight of the alloy using the variable x gr, and also take it as 100%.

Let’s now move on to composing and solving proportions.

x gr – 100%;

24 g – 15%.

x / 24 = 100/15;

We need to find the unknown extreme term of the proportion. To do this, we divide the product of the middle terms by the known extreme term of the proportion.

x = (24 * 100) / 15 = 2400/15 = 160 grams of alloy