-81.07% is the change from 671 to 127
Calculation steps:
[( 127 - 671 ) ÷ 671] x 100 = -81.07%
Formula
Percentage change = [(127 - 671) / 671] x 100
Subtract the new number by the original number
127 - 671 = -544
-544 ÷ 671 = -0.8107302533532041
-0.8107302533532041 x 100 = -81.07%