To bake with 25 kilograms of flour, a common formula is to use approximately 1.5-2% salt, 2-5% sugar, 0.5-1% yeast, and 2-5% shortening, depending on the type of bread. For water, the typical hydration level ranges from 60-75%, meaning you would need about 15-19 kilograms of water. For example, using 2% salt, 3% sugar, 0.75% yeast, and 3% shortening would result in about 0.5 kg salt, 0.75 kg sugar, 0.19 kg yeast, and 0.75 kg shortening. Always adjust based on the specific recipe and desired bread type.