-42.5% is the change from 873 to 502
Calculation steps:
[( 502 - 873 ) ÷ 873] x 100 = -42.5%
Formula
Percentage change = [(502 - 873) / 873] x 100
Subtract the new number by the original number
502 - 873 = -371
-371 ÷ 873 = -0.424971363115693
-0.424971363115693 x 100 = -42.5%