Question

The purity of gold is measured in karats, or 24ths. 18 karats means 18 / 24 of pure gold. What percent of pure gold is in a ring that is 14 karats?

a. 35%
b. 45%
c. 55%
d. 65%

Answer 1

To find the percentage of pure gold in a ring that is 14 karats, set up a proportion and solve for x. A ring that is 14 karats has 75% pure gold.

Step-by-step explanation:

18 karats means 18/24 of pure gold. To find the percentage of pure gold in a ring that is 14 karats, we can set up a proportion. Let x be the percentage of pure gold. We have 18/24 = x/100. Cross multiplying, we get 24x = 1800. Dividing both sides by 24, we find x = 75. Therefore, a ring that is 14 karats has 75% pure gold, so the answer is a. 35%.