how much silver is in a 1966 kennedy half dollar

[EllaLynn]

Based on the provided information, a 1966 Kennedy half dollar is composed of 40% silver.

The context from the Littleton Coin Company product page explicitly describes the coin as a "40% silver clad Kennedy half dollar." This composition is characteristic of Kennedy half dollars minted from 1965 through 1970. The coin is constructed with outer layers of 80% silver bonded to an inner core with a lower silver content, resulting in the overall 40% silver composition. This is a significant reduction from the 90% silver content of the 1964 Kennedy half dollar.