-31.71% is the change from 328 to 224
Calculation steps:
[( 224 - 328 ) ÷ 328] x 100 = -31.71%
Formula
Percentage change = [(224 - 328) / 328] x 100
Subtract the new number by the original number
224 - 328 = -104
-104 ÷ 328 = -0.3170731707317073
-0.3170731707317073 x 100 = -31.71%