Answer:
If 0.25 oz of yeast is used, then 50oz of flour is needed.
It would require 0.5 oz of yeast for 90 oz the flour.
Step-by-step explanation:
We know that the proportion of yeast (y) and flour (f) is 1: 200 when a maximum of 30 servings of bread is made. This is:
![\frac{y}{f} = \frac{1}{200}](https://tex.z-dn.net/?f=%5Cfrac%7By%7D%7Bf%7D%20%3D%20%5Cfrac%7B1%7D%7B200%7D)
So if we use 0.25 oz of yeast:
if 0.25 oz of yeast is used, then 50oz of flour is needed.
If you make 60 servings of bread with 90 oz. Of flour, then you should keep the following ratio:
![\frac{y}{f} =\frac{1}{180}](https://tex.z-dn.net/?f=%5Cfrac%7By%7D%7Bf%7D%20%3D%5Cfrac%7B1%7D%7B180%7D)
So, if we use f = 90 0z of flour:
It would require 0.5 oz of yeast.