### Really Need Some Math Help for a Recipe

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

Ingredients

Water 1000 g
Salt 5 g
Shortening 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. http://www.exploratorium.edu/cooking/...

Good luck.

2 Replies
1. re: mcel215

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

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

2. 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

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.

Thanks!

1. re: RuralDeb

Thank you mcel. Very useful

1. re: petitgateau

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

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

2 Replies
1. re: smtucker

Hey that's neat!
Here's a demo:
http://ruhlman.com/2010/07/ratio-app-...

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

1. re: blue room

or an androidy thing. :-)

2. No, divide 1000/2905 (= .3440234) and multiply each of your ingredients by that number.

Water 344 g
Salt 1.75 g
Shortening 103 g