-21.16% is the change from 671 to 529
Calculation steps:
[( 529 - 671 ) ÷ 671] x 100 = -21.16%
Formula
Percentage change = [(529 - 671) / 671] x 100
Subtract the new number by the original number
529 - 671 = -142
-142 ÷ 671 = -0.21162444113263784
-0.21162444113263784 x 100 = -21.16%