-89.69% is the change from 873 to 90
Calculation steps:
[( 90 - 873 ) ÷ 873] x 100 = -89.69%
Formula
Percentage change = [(90 - 873) / 873] x 100
Subtract the new number by the original number
90 - 873 = -783
-783 ÷ 873 = -0.8969072164948454
-0.8969072164948454 x 100 = -89.69%