-1.07% is the change from 843 to 834
Calculation steps:
[( 834 - 843 ) ÷ 843] x 100 = -1.07%
Formula
Percentage change = [(834 - 843) / 843] x 100
Subtract the new number by the original number
834 - 843 = -9
-9 ÷ 843 = -0.010676156583629894
-0.010676156583629894 x 100 = -1.07%