-53.28% is the change from 839 to 392
Calculation steps:
[( 392 - 839 ) ÷ 839] x 100 = -53.28%
Formula
Percentage change = [(392 - 839) / 839] x 100
Subtract the new number by the original number
392 - 839 = -447
-447 ÷ 839 = -0.532777115613826
-0.532777115613826 x 100 = -53.28%