-10.8% is the change from 917 to 818
Calculation steps:
[( 818 - 917 ) ÷ 917] x 100 = -10.8%
Formula
Percentage change = [(818 - 917) / 917] x 100
Subtract the new number by the original number
818 - 917 = -99
-99 ÷ 917 = -0.1079607415485278
-0.1079607415485278 x 100 = -10.8%