There are 700 grams of silver in a kilogram metal ingot. The rest is copper.

There are 700 grams of silver in a kilogram metal ingot. The rest is copper. How many grams more silver ingot than copper?

Since the mass of the ingot is 1 kilogram or 1000 grams, and the silver in it is 700 grams, the mass of copper in the ingot is:
1000 – 700 = 300 g.
Let us determine by how much the mass of silver in the ingot exceeds the mass of copper, if the ingot contains 300 g of copper and 700 g of silver.
700 – 300 = 400 g.
Answer: There is 400 grams more silver in bullion than copper.