## elizabethann509 3 years ago 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 :)

1. elizabethann509

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 :)

2. saifoo.khan

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

3. elizabethann509

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

4. saifoo.khan

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

5. saifoo.khan

i used "x"

6. elizabethann509

So the way I set it up was correct right?

7. elizabethann509

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

8. saifoo.khan

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

9. elizabethann509

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

10. saifoo.khan

cool.