-7.73% is the change from 673 to 621
Calculation steps:
[( 621 - 673 ) ÷ 673] x 100 = -7.73%
Formula
Percentage change = [(621 - 673) / 673] x 100
Subtract the new number by the original number
621 - 673 = -52
-52 ÷ 673 = -0.07726597325408618
-0.07726597325408618 x 100 = -7.73%