-89.96% is the change from 986 to 99
Calculation steps:
[( 99 - 986 ) ÷ 986] x 100 = -89.96%
Formula
Percentage change = [(99 - 986) / 986] x 100
Subtract the new number by the original number
99 - 986 = -887
-887 ÷ 986 = -0.8995943204868154
-0.8995943204868154 x 100 = -89.96%