-42.39% is the change from 677 to 390
Calculation steps:
[( 390 - 677 ) ÷ 677] x 100 = -42.39%
Formula
Percentage change = [(390 - 677) / 677] x 100
Subtract the new number by the original number
390 - 677 = -287
-287 ÷ 677 = -0.4239290989660266
-0.4239290989660266 x 100 = -42.39%