Question 679169
18 Karat gold contains 18 parts gold and 6 parts other metals. This means that out of every 18+6=24 parts 18/24 is gold (75%) and 6/24 is other metals(25%).

If Amy's new ring contains 12 parts gold and 3 parts other metals that means that out of every 12+3=15 parts 12/15 is gold (80%) and 3/15 is other metals(20%).

The answer is NO!.  Amy's ring is more pure than 18 Karat gold.

Hope this helps---ptaylor