-91.33% is the change from 923 to 80
Calculation steps:
[( 80 - 923 ) ÷ 923] x 100 = -91.33%
Formula
Percentage change = [(80 - 923) / 923] x 100
Subtract the new number by the original number
80 - 923 = -843
-843 ÷ 923 = -0.9133261105092091
-0.9133261105092091 x 100 = -91.33%