So from 1150 to 230 lbs of flour remaining... The percentage decrease was by percentage decrease = ((b-a)/b)*100 b is the original value a is the other value p= ((1150-230)/1150)*100 p = (920 /1150) * 100 p = (0.8) * 100 p = 80
The percentage decrease is 80% from 1150 to 230 lbs of flour.