-43.23% is the change from 687 to 390
Calculation steps:
[( 390 - 687 ) ÷ 687] x 100 = -43.23%
Formula
Percentage change = [(390 - 687) / 687] x 100
Subtract the new number by the original number
390 - 687 = -297
-297 ÷ 687 = -0.43231441048034935
-0.43231441048034935 x 100 = -43.23%