-89.35% is the change from 817 to 87
Calculation steps:
[( 87 - 817 ) ÷ 817] x 100 = -89.35%
Formula
Percentage change = [(87 - 817) / 817] x 100
Subtract the new number by the original number
87 - 817 = -730
-730 ÷ 817 = -0.8935128518971848
-0.8935128518971848 x 100 = -89.35%