-9.01% is the change from 899 to 818
Calculation steps:
[( 818 - 899 ) ÷ 899] x 100 = -9.01%
Formula
Percentage change = [(818 - 899) / 899] x 100
Subtract the new number by the original number
818 - 899 = -81
-81 ÷ 899 = -0.09010011123470522
-0.09010011123470522 x 100 = -9.01%