-3.34% is the change from 689 to 666
Calculation steps:
[( 666 - 689 ) ÷ 689] x 100 = -3.34%
Formula
Percentage change = [(666 - 689) / 689] x 100
Subtract the new number by the original number
666 - 689 = -23
-23 ÷ 689 = -0.033381712626995644
-0.033381712626995644 x 100 = -3.34%