
Based on the provided information, a 1964 Kennedy half dollar contains 90% silver. The specific amount of pure silver in each 1964 coin is 0.3617 troy ounces.
The year a Kennedy half dollar was minted is the critical factor in determining its silver content. The 1964 issue is unique for its 90% silver composition. In subsequent years, the silver content was reduced to 40% before being eliminated entirely in modern versions of the coin. Therefore, the 1964 Kennedy half dollar is highly sought after by both collectors and investors for its significant precious metal value.


