-79.72% is the change from 991 to 201
Calculation steps:
[( 201 - 991 ) ÷ 991] x 100 = -79.72%
Formula
Percentage change = [(201 - 991) / 991] x 100
Subtract the new number by the original number
201 - 991 = -790
-790 ÷ 991 = -0.7971745711402624
-0.7971745711402624 x 100 = -79.72%