-47.68% is the change from 839 to 439
Calculation steps:
[( 439 - 839 ) ÷ 839] x 100 = -47.68%
Formula
Percentage change = [(439 - 839) / 839] x 100
Subtract the new number by the original number
439 - 839 = -400
-400 ÷ 839 = -0.4767580452920143
-0.4767580452920143 x 100 = -47.68%