-11.92% is the change from 671 to 591
Calculation steps:
[( 591 - 671 ) ÷ 671] x 100 = -11.92%
Formula
Percentage change = [(591 - 671) / 671] x 100
Subtract the new number by the original number
591 - 671 = -80
-80 ÷ 671 = -0.11922503725782414
-0.11922503725782414 x 100 = -11.92%