-91.16% is the change from 871 to 77
Calculation steps:
[( 77 - 871 ) ÷ 871] x 100 = -91.16%
Formula
Percentage change = [(77 - 871) / 871] x 100
Subtract the new number by the original number
77 - 871 = -794
-794 ÷ 871 = -0.9115958668197475
-0.9115958668197475 x 100 = -91.16%