Tin lead alloy contains 1.5 kg of lead and 0.5 kg of tin. How much% in the lead alloy and how much tin.

In order to find how many percent the alloy contains lead and tin, we will compose and solve the proportion.

We know from the condition that the alloy contains 1.5 kg of lead and 0.5 kg of tin.

Let’s start by finding the weight of the entire alloy: 1.5 + 0.5 = 2 kg of the alloy is taken as 100%.

Let’s denote by x the percentage of lead in the alloy.

Let’s make a proportion.

2 kg of alloy – 100%;

1.5 kg of lead – x%.

2 / 1.5 = 100 / x;

x = (1.5 * 100) / 2 = 150/2 = 75% lead and (100 – 75) = 25% tin.

Answer: 75% lead and 25% tin.