-0.6% is the change from 839 to 834
Calculation steps:
[( 834 - 839 ) ÷ 839] x 100 = -0.6%
Formula
Percentage change = [(834 - 839) / 839] x 100
Subtract the new number by the original number
834 - 839 = -5
-5 ÷ 839 = -0.0059594755661501785
-0.0059594755661501785 x 100 = -0.6%