-95.42% is the change from 873 to 40
Calculation steps:
[( 40 - 873 ) ÷ 873] x 100 = -95.42%
Formula
Percentage change = [(40 - 873) / 873] x 100
Subtract the new number by the original number
40 - 873 = -833
-833 ÷ 873 = -0.9541809851088202
-0.9541809851088202 x 100 = -95.42%