-58.36% is the change from 939 to 391
Calculation steps:
[( 391 - 939 ) ÷ 939] x 100 = -58.36%
Formula
Percentage change = [(391 - 939) / 939] x 100
Subtract the new number by the original number
391 - 939 = -548
-548 ÷ 939 = -0.5835995740149095
-0.5835995740149095 x 100 = -58.36%