-18.59% is the change from 839 to 683
Calculation steps:
[( 683 - 839 ) ÷ 839] x 100 = -18.59%
Formula
Percentage change = [(683 - 839) / 839] x 100
Subtract the new number by the original number
683 - 839 = -156
-156 ÷ 839 = -0.18593563766388557
-0.18593563766388557 x 100 = -18.59%