-89.59% is the change from 836 to 87
Calculation steps:
[( 87 - 836 ) ÷ 836] x 100 = -89.59%
Formula
Percentage change = [(87 - 836) / 836] x 100
Subtract the new number by the original number
87 - 836 = -749
-749 ÷ 836 = -0.895933014354067
-0.895933014354067 x 100 = -89.59%