-83.65% is the change from 991 to 162
Calculation steps:
[( 162 - 991 ) ÷ 991] x 100 = -83.65%
Formula
Percentage change = [(162 - 991) / 991] x 100
Subtract the new number by the original number
162 - 991 = -829
-829 ÷ 991 = -0.8365287588294652
-0.8365287588294652 x 100 = -83.65%