-51.54% is the change from 939 to 455
Calculation steps:
[( 455 - 939 ) ÷ 939] x 100 = -51.54%
Formula
Percentage change = [(455 - 939) / 939] x 100
Subtract the new number by the original number
455 - 939 = -484
-484 ÷ 939 = -0.5154419595314164
-0.5154419595314164 x 100 = -51.54%