-90.82% is the change from 98 to 9
Calculation steps:
[( 9 - 98 ) ÷ 98] x 100 = -90.82%
Formula
Percentage change = [(9 - 98) / 98] x 100
Subtract the new number by the original number
9 - 98 = -89
-89 ÷ 98 = -0.9081632653061225
-0.9081632653061225 x 100 = -90.82%