-98.28% is the change from 873 to 15
Calculation steps:
[( 15 - 873 ) ÷ 873] x 100 = -98.28%
Formula
Percentage change = [(15 - 873) / 873] x 100
Subtract the new number by the original number
15 - 873 = -858
-858 ÷ 873 = -0.9828178694158075
-0.9828178694158075 x 100 = -98.28%