-88.52% is the change from 871 to 100
Calculation steps:
[( 100 - 871 ) ÷ 871] x 100 = -88.52%
Formula
Percentage change = [(100 - 871) / 871] x 100
Subtract the new number by the original number
100 - 871 = -771
-771 ÷ 871 = -0.8851894374282434
-0.8851894374282434 x 100 = -88.52%