-89.02% is the change from 82 to 9
Calculation steps:
[( 9 - 82 ) ÷ 82] x 100 = -89.02%
Formula
Percentage change = [(9 - 82) / 82] x 100
Subtract the new number by the original number
9 - 82 = -73
-73 ÷ 82 = -0.8902439024390244
-0.8902439024390244 x 100 = -89.02%