-99.57% is the change from 923 to 4
Calculation steps:
[( 4 - 923 ) ÷ 923] x 100 = -99.57%
Formula
Percentage change = [(4 - 923) / 923] x 100
Subtract the new number by the original number
4 - 923 = -919
-919 ÷ 923 = -0.9956663055254604
-0.9956663055254604 x 100 = -99.57%