-0.15% is the change from 681 to 680
Calculation steps:
[( 680 - 681 ) ÷ 681] x 100 = -0.15%
Formula
Percentage change = [(680 - 681) / 681] x 100
Subtract the new number by the original number
680 - 681 = -1
-1 ÷ 681 = -0.0014684287812041115
-0.0014684287812041115 x 100 = -0.15%