-42.6% is the change from 939 to 539
Calculation steps:
[( 539 - 939 ) ÷ 939] x 100 = -42.6%
Formula
Percentage change = [(539 - 939) / 939] x 100
Subtract the new number by the original number
539 - 939 = -400
-400 ÷ 939 = -0.42598509052183176
-0.42598509052183176 x 100 = -42.6%