The concentration of platinum in a necklace is 12%. The necklace weighs 18 g. Find the amount of platinum in the necklace.
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fraction time! notice that the amout of platinum is 12/100 of the necklace. does this help?
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Let me give you a hint. this is asking "how much of 18 grams is platinum"
12/100 divided by 18/1
it is 12/100 * 18
i should say (12/100) * 18
but I don't understand how many grams that is
sorry brain fart for a second on my part
think about this 12/100 is the amout of platinum in the necklace.
18 grams is the amout of material
(12/100) * 18 is the amount of platinum in the necklace.
so 54/25 is the amount of platinum in the necklace
remember that 54/25 is just like saying 2.16 so there is 2.16 or 54/25 grams of platinum in the necklace