-8.16% is the change from 331 to 304
Calculation steps:
[( 304 - 331 ) ÷ 331] x 100 = -8.16%
Formula
Percentage change = [(304 - 331) / 331] x 100
Subtract the new number by the original number
304 - 331 = -27
-27 ÷ 331 = -0.08157099697885196
-0.08157099697885196 x 100 = -8.16%