-90.42% is the change from 877 to 84
Calculation steps:
[( 84 - 877 ) ÷ 877] x 100 = -90.42%
Formula
Percentage change = [(84 - 877) / 877] x 100
Subtract the new number by the original number
84 - 877 = -793
-793 ÷ 877 = -0.9042189281641961
-0.9042189281641961 x 100 = -90.42%