-83.84% is the change from 990 to 160
Calculation steps:
[( 160 - 990 ) ÷ 990] x 100 = -83.84%
Formula
Percentage change = [(160 - 990) / 990] x 100
Subtract the new number by the original number
160 - 990 = -830
-830 ÷ 990 = -0.8383838383838383
-0.8383838383838383 x 100 = -83.84%