-30.53% is the change from 321 to 223
Calculation steps:
[( 223 - 321 ) ÷ 321] x 100 = -30.53%
Formula
Percentage change = [(223 - 321) / 321] x 100
Subtract the new number by the original number
223 - 321 = -98
-98 ÷ 321 = -0.3052959501557632
-0.3052959501557632 x 100 = -30.53%