-0.83% is the change from 842 to 835
Calculation steps:
[( 835 - 842 ) ÷ 842] x 100 = -0.83%
Formula
Percentage change = [(835 - 842) / 842] x 100
Subtract the new number by the original number
835 - 842 = -7
-7 ÷ 842 = -0.00831353919239905
-0.00831353919239905 x 100 = -0.83%