-89.3% is the change from 813 to 87
Calculation steps:
[( 87 - 813 ) ÷ 813] x 100 = -89.3%
Formula
Percentage change = [(87 - 813) / 813] x 100
Subtract the new number by the original number
87 - 813 = -726
-726 ÷ 813 = -0.8929889298892989
-0.8929889298892989 x 100 = -89.3%