-89.13% is the change from 800 to 87
Calculation steps:
[( 87 - 800 ) ÷ 800] x 100 = -89.13%
Formula
Percentage change = [(87 - 800) / 800] x 100
Subtract the new number by the original number
87 - 800 = -713
-713 ÷ 800 = -0.89125
-0.89125 x 100 = -89.13%