-42.38% is the change from 873 to 503
Calculation steps:
[( 503 - 873 ) ÷ 873] x 100 = -42.38%
Formula
Percentage change = [(503 - 873) / 873] x 100
Subtract the new number by the original number
503 - 873 = -370
-370 ÷ 873 = -0.4238258877434135
-0.4238258877434135 x 100 = -42.38%