The alloy weighing 320 g contains 112 g of tin. What is the percentage of tin in this alloy?

Let 320 be 100%.

1. Let’s find how many grams of alloy are in 1%, dividing the mass of the entire alloy by percent.

320/100 = 3.2 (g) falls on 1%.

2. Let’s find the percentage of tin in this alloy by dividing the entire weight of the tin by the number of grams per 1%.

112 / 3.2 = 35% of the tin is in glory.

Answer: 35%.

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