-2.6% is the change from 691 to 673
Calculation steps:
[( 673 - 691 ) ÷ 691] x 100 = -2.6%
Formula
Percentage change = [(673 - 691) / 691] x 100
Subtract the new number by the original number
673 - 691 = -18
-18 ÷ 691 = -0.02604920405209841
-0.02604920405209841 x 100 = -2.6%