-10.78% is the change from 909 to 811
Calculation steps:
[( 811 - 909 ) ÷ 909] x 100 = -10.78%
Formula
Percentage change = [(811 - 909) / 909] x 100
Subtract the new number by the original number
811 - 909 = -98
-98 ÷ 909 = -0.1078107810781078
-0.1078107810781078 x 100 = -10.78%