-89.94% is the change from 984 to 99
Calculation steps:
[( 99 - 984 ) ÷ 984] x 100 = -89.94%
Formula
Percentage change = [(99 - 984) / 984] x 100
Subtract the new number by the original number
99 - 984 = -885
-885 ÷ 984 = -0.899390243902439
-0.899390243902439 x 100 = -89.94%