-40.9% is the change from 687 to 406
Calculation steps:
[( 406 - 687 ) ÷ 687] x 100 = -40.9%
Formula
Percentage change = [(406 - 687) / 687] x 100
Subtract the new number by the original number
406 - 687 = -281
-281 ÷ 687 = -0.4090247452692867
-0.4090247452692867 x 100 = -40.9%