-26.84% is the change from 939 to 687
Calculation steps:
[( 687 - 939 ) ÷ 939] x 100 = -26.84%
Formula
Percentage change = [(687 - 939) / 939] x 100
Subtract the new number by the original number
687 - 939 = -252
-252 ÷ 939 = -0.268370607028754
-0.268370607028754 x 100 = -26.84%