-2.61% is the change from 689 to 671
Calculation steps:
[( 671 - 689 ) ÷ 689] x 100 = -2.61%
Formula
Percentage change = [(671 - 689) / 689] x 100
Subtract the new number by the original number
671 - 689 = -18
-18 ÷ 689 = -0.026124818577648767
-0.026124818577648767 x 100 = -2.61%