-52.21% is the change from 839 to 401
Calculation steps:
[( 401 - 839 ) ÷ 839] x 100 = -52.21%
Formula
Percentage change = [(401 - 839) / 839] x 100
Subtract the new number by the original number
401 - 839 = -438
-438 ÷ 839 = -0.5220500595947557
-0.5220500595947557 x 100 = -52.21%