-9.06% is the change from 331 to 301
Calculation steps:
[( 301 - 331 ) ÷ 331] x 100 = -9.06%
Formula
Percentage change = [(301 - 331) / 331] x 100
Subtract the new number by the original number
301 - 331 = -30
-30 ÷ 331 = -0.09063444108761329
-0.09063444108761329 x 100 = -9.06%