-54.21% is the change from 939 to 430
Calculation steps:
[( 430 - 939 ) ÷ 939] x 100 = -54.21%
Formula
Percentage change = [(430 - 939) / 939] x 100
Subtract the new number by the original number
430 - 939 = -509
-509 ÷ 939 = -0.5420660276890309
-0.5420660276890309 x 100 = -54.21%