-85.99% is the change from 871 to 122
Calculation steps:
[( 122 - 871 ) ÷ 871] x 100 = -85.99%
Formula
Percentage change = [(122 - 871) / 871] x 100
Subtract the new number by the original number
122 - 871 = -749
-749 ÷ 871 = -0.8599311136624569
-0.8599311136624569 x 100 = -85.99%