-12.97% is the change from 671 to 584
Calculation steps:
[( 584 - 671 ) ÷ 671] x 100 = -12.97%
Formula
Percentage change = [(584 - 671) / 671] x 100
Subtract the new number by the original number
584 - 671 = -87
-87 ÷ 671 = -0.12965722801788376
-0.12965722801788376 x 100 = -12.97%