-54.1% is the change from 939 to 431
Calculation steps:
[( 431 - 939 ) ÷ 939] x 100 = -54.1%
Formula
Percentage change = [(431 - 939) / 939] x 100
Subtract the new number by the original number
431 - 939 = -508
-508 ÷ 939 = -0.5410010649627263
-0.5410010649627263 x 100 = -54.1%