-14.9% is the change from 671 to 571
Calculation steps:
[( 571 - 671 ) ÷ 671] x 100 = -14.9%
Formula
Percentage change = [(571 - 671) / 671] x 100
Subtract the new number by the original number
571 - 671 = -100
-100 ÷ 671 = -0.14903129657228018
-0.14903129657228018 x 100 = -14.9%