-47.56% is the change from 839 to 440
Calculation steps:
[( 440 - 839 ) ÷ 839] x 100 = -47.56%
Formula
Percentage change = [(440 - 839) / 839] x 100
Subtract the new number by the original number
440 - 839 = -399
-399 ÷ 839 = -0.4755661501787843
-0.4755661501787843 x 100 = -47.56%