-99.08% is the change from 871 to 8
Calculation steps:
[( 8 - 871 ) ÷ 871] x 100 = -99.08%
Formula
Percentage change = [(8 - 871) / 871] x 100
Subtract the new number by the original number
8 - 871 = -863
-863 ÷ 871 = -0.9908151549942594
-0.9908151549942594 x 100 = -99.08%