-30.79% is the change from 328 to 227
Calculation steps:
[( 227 - 328 ) ÷ 328] x 100 = -30.79%
Formula
Percentage change = [(227 - 328) / 328] x 100
Subtract the new number by the original number
227 - 328 = -101
-101 ÷ 328 = -0.3079268292682927
-0.3079268292682927 x 100 = -30.79%