I need to set up a proportion for this question:
A recipe for chocolate chip cookies requires a half cup of sugar for a serving of 8 cookies. You need to make 30 cookies for your Math class and decide to use proportions to calculate how much sugar you need.
Tell me if I am doing this right please :)

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- anonymous

I know that 1/2cup sugar = 8 cookies so that means that C = 30.
I need to find out what C is.
I think that maybe I would set up the proportion like this but I'm not sure:
|dw:1330997293354:dw|
And then I would cross multiply. The only thing I'm not sure I'm doing right is setting up the proportion. Please let me know. Thank you :)

- saifoo.khan

The best way, not to get confused again is, use a heading
Cup : Cookies
Now try it

- anonymous

Oh and I am using the C to represent the unknown CUP of sugar. I suppose I could have used S for sugar but oh well :p

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## More answers

- saifoo.khan

Cup : Cookies
0.5 : 8
x : 30
Now cross multiply.

- saifoo.khan

i used "x"

- anonymous

So the way I set it up was correct right?

- anonymous

Only you used : instead of putting it in fraction form.

- saifoo.khan

Wait. sorry.
Yes u are correct. i didn't saw your working actually.

- anonymous

Ha okay thanks! I just wanted to check and make sure that I was doing this right :)

- saifoo.khan

cool.

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