-31.1% is the change from 328 to 226
Calculation steps:
[( 226 - 328 ) ÷ 328] x 100 = -31.1%
Formula
Percentage change = [(226 - 328) / 328] x 100
Subtract the new number by the original number
226 - 328 = -102
-102 ÷ 328 = -0.31097560975609756
-0.31097560975609756 x 100 = -31.1%