-57.42% is the change from 923 to 393
Calculation steps:
[( 393 - 923 ) ÷ 923] x 100 = -57.42%
Formula
Percentage change = [(393 - 923) / 923] x 100
Subtract the new number by the original number
393 - 923 = -530
-530 ÷ 923 = -0.5742145178764897
-0.5742145178764897 x 100 = -57.42%