Source:
Ratio: The Simple Codes Behind the Craft of Everyday Cooking by Michael Ruhlman.
The Ratios:
Bread = 5 parts flour: 3 parts water (plus yeast and salt)
Pasta Dough = 3 parts flour: 2 parts egg
Pie Dough = 3 parts flour: 2 parts fat: 1 part water
Biscuit = 3 parts flour: 1 part fat: 2...