-54.7% is the change from 861 to 390
Calculation steps:
[( 390 - 861 ) ÷ 861] x 100 = -54.7%
Formula
Percentage change = [(390 - 861) / 861] x 100
Subtract the new number by the original number
390 - 861 = -471
-471 ÷ 861 = -0.5470383275261324
-0.5470383275261324 x 100 = -54.7%