-40.79% is the change from 939 to 556
Calculation steps:
[( 556 - 939 ) ÷ 939] x 100 = -40.79%
Formula
Percentage change = [(556 - 939) / 939] x 100
Subtract the new number by the original number
556 - 939 = -383
-383 ÷ 939 = -0.4078807241746539
-0.4078807241746539 x 100 = -40.79%