-51.61% is the change from 839 to 406
Calculation steps:
[( 406 - 839 ) ÷ 839] x 100 = -51.61%
Formula
Percentage change = [(406 - 839) / 839] x 100
Subtract the new number by the original number
406 - 839 = -433
-433 ÷ 839 = -0.5160905840286055
-0.5160905840286055 x 100 = -51.61%