Question

The concentration of platinum in a necklace is 12%. The necklace weighs 18 g. Find the amount of platinum in the necklace.

Answer 1

fraction time! notice that the amout of platinum is 12/100 of the necklace. does this help?

Answer 2

do I divide by 18?

Answer 3

Why did you choose to do that?

Answer 4

Let me give you a hint. this is asking "how much of 18 grams is platinum"

Answer 5

12/100 divided by 18/1

Answer 6

it is 12/100 * 18

Answer 7

i should say (12/100) * 18

Answer 8

54/25

Answer 9

but I don't understand how many grams that is

Answer 10

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

Answer 11

remember that 54/25 is just like saying 2.16 so there is 2.16 or 54/25 grams of platinum in the necklace

Answer 12

how did you get that?

Answer 13

i typed 54/25 into a calculator :)

Answer 14

duh

Answer 15

thanks!!!!

Answer 16

NP :D