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Really Need Some Math Help for a Recipe

RuralDeb Feb 25, 2011 03:38 PM

I have a recipe for choux paste that makes 2905 grams of dough. I need to make 1000 gm (1 kilo) of dough.


Water 1000 g
Salt 5 g
Shortening 300 g
Bread Flour 300 g
Pastry Flour 300 g
Whole Eggs 1000 g
Total 2905

I am totally incapable of doing this. Why? Don't know. Should I try to figure it out to 3000 gm then divide by 3 ...?

This is for a baking test I'm doing so I have to be right. I'd appreciate the help.

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  1. mcel215 RE: RuralDeb Feb 25, 2011 03:48 PM


    Maybe this site will help you.

    Good luck.

    2 Replies
    1. re: mcel215
      RuralDeb RE: mcel215 Feb 25, 2011 03:52 PM

      Thanks it's a good site. I'm not trying to convert from anything into anything though, just don't know how to do the math.

      1. re: RuralDeb
        mcel215 RE: RuralDeb Feb 26, 2011 02:11 AM

        I hear ya, Deb. Math is like a foreign language to me also. ;)

    2. blue room RE: RuralDeb Feb 25, 2011 04:03 PM

      To do it exactly, you'd divide 1000 by 2905. That is 0.34.
      Then multiply each ingredient by 0.34. For instance, 300 grams multiplied by 0.34 is 102 grams.

      3 Replies
      1. re: blue room
        RuralDeb RE: blue room Feb 25, 2011 04:11 PM

        Exactly! So grateful for your help. I really admire people who can figure out numbers - it just doesn't make any sense to me unless it's laid out like you did.


        1. re: RuralDeb
          petitgateau RE: RuralDeb Feb 25, 2011 04:32 PM

          Thank you mcel. Very useful

          1. re: petitgateau
            mcel215 RE: petitgateau Feb 26, 2011 02:10 AM

            You are very welcome, it's my go to site when I am a bit challenged, lol!

      2. s
        smtucker RE: RuralDeb Feb 25, 2011 04:56 PM

        If you own an iTouch or iPhone, the Ratio app does all the math for you!

        2 Replies
        1. re: smtucker
          blue room RE: smtucker Feb 25, 2011 05:07 PM

          Hey that's neat!
          Here's a demo:

          Now all I need is a touch-phone gizmo thingy--Gawd I'm old and out-of-touch!

          1. re: blue room
            smtucker RE: blue room Feb 25, 2011 05:18 PM

            or an androidy thing. :-)

        2. todao RE: RuralDeb Feb 25, 2011 05:25 PM

          No, divide 1000/2905 (= .3440234) and multiply each of your ingredients by that number.
          Here's your ingredient totals:

          Water 344 g
          Salt 1.75 g
          Shortening 103 g
          Bread Flour 103 g
          Pastry Flour 103 g
          Whole Eggs 344 g
          Total 998.75

          Is about as close as you're going to get.

          1 Reply
          1. re: todao
            RuralDeb RE: todao Feb 25, 2011 06:33 PM

            Everyone's been great. todao, math is your thing! I am so happy to learn about the app,, the demo is great and I just have to figure out how to afford it!

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