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jblovemath

  • 4 years ago

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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  1. Walleye
    • 4 years ago
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    fraction time! notice that the amout of platinum is 12/100 of the necklace. does this help?

  2. jblovemath
    • 4 years ago
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    do I divide by 18?

  3. Walleye
    • 4 years ago
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    Why did you choose to do that?

  4. Walleye
    • 4 years ago
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    Let me give you a hint. this is asking "how much of 18 grams is platinum"

  5. jblovemath
    • 4 years ago
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    12/100 divided by 18/1

  6. Walleye
    • 4 years ago
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    it is 12/100 * 18

  7. Walleye
    • 4 years ago
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    i should say (12/100) * 18

  8. jblovemath
    • 4 years ago
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    54/25

  9. jblovemath
    • 4 years ago
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    but I don't understand how many grams that is

  10. Walleye
    • 4 years ago
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    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

  11. Walleye
    • 4 years ago
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    remember that 54/25 is just like saying 2.16 so there is 2.16 or 54/25 grams of platinum in the necklace

  12. jblovemath
    • 4 years ago
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    how did you get that?

  13. Walleye
    • 4 years ago
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    i typed 54/25 into a calculator :)

  14. jblovemath
    • 4 years ago
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    duh

  15. jblovemath
    • 4 years ago
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    thanks!!!!

  16. Walleye
    • 4 years ago
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    NP :D

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