-85.39% is the change from 671 to 98
Calculation steps:
[( 98 - 671 ) ÷ 671] x 100 = -85.39%
Formula
Percentage change = [(98 - 671) / 671] x 100
Subtract the new number by the original number
98 - 671 = -573
-573 ÷ 671 = -0.8539493293591655
-0.8539493293591655 x 100 = -85.39%