-89.98% is the change from 998 to 100
Calculation steps:
[( 100 - 998 ) ÷ 998] x 100 = -89.98%
Formula
Percentage change = [(100 - 998) / 998] x 100
Subtract the new number by the original number
100 - 998 = -898
-898 ÷ 998 = -0.8997995991983968
-0.8997995991983968 x 100 = -89.98%