-18.41% is the change from 391 to 319
Calculation steps:
[( 319 - 391 ) ÷ 391] x 100 = -18.41%
Formula
Percentage change = [(319 - 391) / 391] x 100
Subtract the new number by the original number
319 - 391 = -72
-72 ÷ 391 = -0.18414322250639387
-0.18414322250639387 x 100 = -18.41%