-26.83% is the change from 671 to 491
Calculation steps:
[( 491 - 671 ) ÷ 671] x 100 = -26.83%
Formula
Percentage change = [(491 - 671) / 671] x 100
Subtract the new number by the original number
491 - 671 = -180
-180 ÷ 671 = -0.26825633383010433
-0.26825633383010433 x 100 = -26.83%