-23.71% is the change from 873 to 666
Calculation steps:
[( 666 - 873 ) ÷ 873] x 100 = -23.71%
Formula
Percentage change = [(666 - 873) / 873] x 100
Subtract the new number by the original number
666 - 873 = -207
-207 ÷ 873 = -0.23711340206185566
-0.23711340206185566 x 100 = -23.71%