-39.3% is the change from 939 to 570
Calculation steps:
[( 570 - 939 ) ÷ 939] x 100 = -39.3%
Formula
Percentage change = [(570 - 939) / 939] x 100
Subtract the new number by the original number
570 - 939 = -369
-369 ÷ 939 = -0.3929712460063898
-0.3929712460063898 x 100 = -39.3%