-89.34% is the change from 816 to 87
Calculation steps:
[( 87 - 816 ) ÷ 816] x 100 = -89.34%
Formula
Percentage change = [(87 - 816) / 816] x 100
Subtract the new number by the original number
87 - 816 = -729
-729 ÷ 816 = -0.8933823529411765
-0.8933823529411765 x 100 = -89.34%