-42.07% is the change from 839 to 486
Calculation steps:
[( 486 - 839 ) ÷ 839] x 100 = -42.07%
Formula
Percentage change = [(486 - 839) / 839] x 100
Subtract the new number by the original number
486 - 839 = -353
-353 ÷ 839 = -0.42073897497020263
-0.42073897497020263 x 100 = -42.07%