-97.32% is the change from 857 to 23
Calculation steps:
[( 23 - 857 ) ÷ 857] x 100 = -97.32%
Formula
Percentage change = [(23 - 857) / 857] x 100
Subtract the new number by the original number
23 - 857 = -834
-834 ÷ 857 = -0.9731621936989499
-0.9731621936989499 x 100 = -97.32%