An alloy of tin and lead contains 1.52 kg of lead and 0.76 kg of tin. What part of the alloy (by weight) is tin and what part is lead?

First, we find the mass of the entire alloy:
1.52 + 0.76 = 2.28 (kg) – the mass of the entire alloy
To find what part of the tin is, you need to divide the mass of tin by the mass of the entire alloy:
0.76 / 2.28 = (76/100) / (228/100) = 76/100 * 100/228 = (76 * 100) / (100 * 228) = 1/3 (alloy) – is tin
Similarly, we find what part of the alloy is lead:
1.52 / 2.28 = (152/100) / (228/100) = 152/100 * 100/228 = (152 * 100) / (100 * 228) = 2/3 (alloy) – is lead
Answer: Tin is 1/3 of the alloy, lead is 2/3 of the alloy