-2.35% is the change from 681 to 665
Calculation steps:
[( 665 - 681 ) ÷ 681] x 100 = -2.35%
Formula
Percentage change = [(665 - 681) / 681] x 100
Subtract the new number by the original number
665 - 681 = -16
-16 ÷ 681 = -0.023494860499265784
-0.023494860499265784 x 100 = -2.35%