-10.54% is the change from 911 to 815
Calculation steps:
[( 815 - 911 ) ÷ 911] x 100 = -10.54%
Formula
Percentage change = [(815 - 911) / 911] x 100
Subtract the new number by the original number
815 - 911 = -96
-96 ÷ 911 = -0.10537870472008781
-0.10537870472008781 x 100 = -10.54%