-98.51% is the change from 871 to 13
Calculation steps:
[( 13 - 871 ) ÷ 871] x 100 = -98.51%
Formula
Percentage change = [(13 - 871) / 871] x 100
Subtract the new number by the original number
13 - 871 = -858
-858 ÷ 871 = -0.9850746268656716
-0.9850746268656716 x 100 = -98.51%