-99.09% is the change from 986 to 9
Calculation steps:
[( 9 - 986 ) ÷ 986] x 100 = -99.09%
Formula
Percentage change = [(9 - 986) / 986] x 100
Subtract the new number by the original number
9 - 986 = -977
-977 ÷ 986 = -0.9908722109533469
-0.9908722109533469 x 100 = -99.09%