-43.45% is the change from 939 to 531
Calculation steps:
[( 531 - 939 ) ÷ 939] x 100 = -43.45%
Formula
Percentage change = [(531 - 939) / 939] x 100
Subtract the new number by the original number
531 - 939 = -408
-408 ÷ 939 = -0.43450479233226835
-0.43450479233226835 x 100 = -43.45%