http://finejewelrybid.com/help-i-dont-know-how-to-do-this-thank-you-in-advance/ Sat, 20 Nov 2010 04:14:41 +0000 hourly 1 http://wordpress.org/?v=3.0.3 http://finejewelrybid.com/help-i-dont-know-how-to-do-this-thank-you-in-advance/comment-page-1/#comment-5209 D.W. Sat, 19 Sep 2009 15:05:01 +0000 http://finejewelrybid.com/help-i-dont-know-how-to-do-this-thank-you-in-advance/#comment-5209 18K gold contains 18/24 = 75% gold. 75% of 0.4 oz = 0.3 oz gold 0.3 oz × $300/oz = $90 18K gold contains 18/24 = 75% gold.
75% of 0.4 oz = 0.3 oz gold
0.3 oz × $300/oz = $90

]]> http://finejewelrybid.com/help-i-dont-know-how-to-do-this-thank-you-in-advance/comment-page-1/#comment-5208 llaffer Sat, 19 Sep 2009 09:49:07 +0000 http://finejewelrybid.com/help-i-dont-know-how-to-do-this-thank-you-in-advance/#comment-5208 You need to find how much of the 0.4 oz ring is gold. Since it's 18k, that means it's 18/24 gold. So we can set up a ratio: gold : total 18/24 = n/0.4 where n is the amount of gold in the ring Cross multiply to get: 24n = 18 (0.4) 24n = 7.2 n = 0.3 So there 0.3 oz of gold in the ring Since it's $300 per oz: 300 ($/oz) * (0.3 oz) = $90 The ring's value is $90. You need to find how much of the 0.4 oz ring is gold.
Since it’s 18k, that means it’s 18/24 gold.
So we can set up a ratio: gold : total
18/24 = n/0.4
where n is the amount of gold in the ring
Cross multiply to get:
24n = 18 (0.4)
24n = 7.2
n = 0.3
So there 0.3 oz of gold in the ring
Since it’s $300 per oz:
300 ($/oz) * (0.3 oz) = $90
The ring’s value is $90.

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