-0.71% is the change from 842 to 836
Calculation steps:
[( 836 - 842 ) ÷ 842] x 100 = -0.71%
Formula
Percentage change = [(836 - 842) / 842] x 100
Subtract the new number by the original number
836 - 842 = -6
-6 ÷ 842 = -0.007125890736342043
-0.007125890736342043 x 100 = -0.71%