-10.98% is the change from 911 to 811
Calculation steps:
[( 811 - 911 ) ÷ 911] x 100 = -10.98%
Formula
Percentage change = [(811 - 911) / 911] x 100
Subtract the new number by the original number
811 - 911 = -100
-100 ÷ 911 = -0.10976948408342481
-0.10976948408342481 x 100 = -10.98%