
Based on established numismatic information, as the provided context was not sufficient for a detailed answer, a 1967 Kennedy half dollar contains 40% silver.
This particular coin is part of a series of Kennedy half dollars, minted from 1965 through 1970, that are known as "silver-clad." The coin's composition consists of an outer layer of 80% silver and 20% copper bonded to an inner core of approximately 21% silver and 79% copper. This layered structure results in an overall metallic composition of 40% silver and 60% copper.
In terms of actual silver weight, a 1967 half dollar has a total weight of 11.5 grams. With its 40% silver content, the coin contains a total of 0.1479 troy ounces, or approximately 4.6 grams, of pure silver. This composition was a result of the Coinage Act of 1965, which was passed to reduce the amount of silver in circulating U.S. coinage due to the rising price of the precious metal.


