-27.05% is the change from 939 to 685
Calculation steps:
[( 685 - 939 ) ÷ 939] x 100 = -27.05%
Formula
Percentage change = [(685 - 939) / 939] x 100
Subtract the new number by the original number
685 - 939 = -254
-254 ÷ 939 = -0.27050053248136313
-0.27050053248136313 x 100 = -27.05%