-37.74% is the change from 628 to 391
Calculation steps:
[( 391 - 628 ) ÷ 628] x 100 = -37.74%
Formula
Percentage change = [(391 - 628) / 628] x 100
Subtract the new number by the original number
391 - 628 = -237
-237 ÷ 628 = -0.37738853503184716
-0.37738853503184716 x 100 = -37.74%