-1.62% is the change from 680 to 669
Calculation steps:
[( 669 - 680 ) ÷ 680] x 100 = -1.62%
Formula
Percentage change = [(669 - 680) / 680] x 100
Subtract the new number by the original number
669 - 680 = -11
-11 ÷ 680 = -0.016176470588235296
-0.016176470588235296 x 100 = -1.62%