# Pure gold is 24 karats. If a piece of jewelry is marked “18-karat gold”, what percent pure is it?

2
by drummerchard

2015-05-20T20:15:07+08:00

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We just need to find the rate, so we are given with the percentage and base which are 18 and 24 respectively.

Therefore it is 0.75*100=75% pure gold.
2015-05-21T14:40:24+08:00

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To find the percent, divide the number by the total, simply:

18 divided by 24 is 75%

Meaning, the other 25% is fake. Hope this helps =)