-1.01% is the change from 199 to 197
Calculation steps:
[( 197 - 199 ) ÷ 199] x 100 = -1.01%
Formula
Percentage change = [(197 - 199) / 199] x 100
Subtract the new number by the original number
197 - 199 = -2
-2 ÷ 199 = -0.010050251256281407
-0.010050251256281407 x 100 = -1.01%