-9.97% is the change from 301 to 271
Calculation steps:
[( 271 - 301 ) ÷ 301] x 100 = -9.97%
Formula
Percentage change = [(271 - 301) / 301] x 100
Subtract the new number by the original number
271 - 301 = -30
-30 ÷ 301 = -0.09966777408637874
-0.09966777408637874 x 100 = -9.97%