-1% is the change from 201 to 199
Calculation steps:
[( 199 - 201 ) ÷ 201] x 100 = -1%
Formula
Percentage change = [(199 - 201) / 201] x 100
Subtract the new number by the original number
199 - 201 = -2
-2 ÷ 201 = -0.009950248756218905
-0.009950248756218905 x 100 = -1%