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<p>[QUOTE=&quot;foundinrolls, post: 1803210, member: 4350&quot;]I think the &quot;Redbook&quot; is correct&nbsp; and the Mint website is correct.</p><p><br /></p><p>In the &quot;Redbook&quot;</p><p>The core of the coin is 99.2% zinc, 0.8% copper.&nbsp; </p><p>The coating is pure 100% copper.&nbsp; &nbsp; </p><p>The Redbook isolates the compositions of the core and the surface material.&nbsp; </p><p><br /></p><p>When the copper of the plating is added to the copper that is a percentage of the core,&nbsp; you get an overall composition of 97.5 zinc and 2.5%copper.</p><p><br /></p><p>The Mint site says &quot;the composition was changed to 97.5 percent zinc and 2.5 percent copper (copper-plated zinc).&quot;</p><p><br /></p><p>They put parenthesis around copper-plated zinc to indicate the overall structure of the coin.&nbsp; They didn&#039;t say that the copper plating was 2.5% of the total weight of the coin.&nbsp; Don&#039;t ask me to do the math<img src="styles/default/xenforo/clear.png" class="mceSmilieSprite mceSmilie1" alt=":)" unselectable="on" unselectable="on" />[/QUOTE]</p><p><br /></p>

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