-64.45% is the change from 391 to 139
Calculation steps:
[( 139 - 391 ) ÷ 391] x 100 = -64.45%
Formula
Percentage change = [(139 - 391) / 391] x 100
Subtract the new number by the original number
139 - 391 = -252
-252 ÷ 391 = -0.6445012787723785
-0.6445012787723785 x 100 = -64.45%