-19.69% is the change from 391 to 314
Calculation steps:
[( 314 - 391 ) ÷ 391] x 100 = -19.69%
Formula
Percentage change = [(314 - 391) / 391] x 100
Subtract the new number by the original number
314 - 391 = -77
-77 ÷ 391 = -0.1969309462915601
-0.1969309462915601 x 100 = -19.69%