-81.82% is the change from 671 to 122
Calculation steps:
[( 122 - 671 ) ÷ 671] x 100 = -81.82%
Formula
Percentage change = [(122 - 671) / 671] x 100
Subtract the new number by the original number
122 - 671 = -549
-549 ÷ 671 = -0.8181818181818182
-0.8181818181818182 x 100 = -81.82%