-27.03% is the change from 873 to 637
Calculation steps:
[( 637 - 873 ) ÷ 873] x 100 = -27.03%
Formula
Percentage change = [(637 - 873) / 873] x 100
Subtract the new number by the original number
637 - 873 = -236
-236 ÷ 873 = -0.27033218785796104
-0.27033218785796104 x 100 = -27.03%