-29.28% is the change from 321 to 227
Calculation steps:
[( 227 - 321 ) ÷ 321] x 100 = -29.28%
Formula
Percentage change = [(227 - 321) / 321] x 100
Subtract the new number by the original number
227 - 321 = -94
-94 ÷ 321 = -0.29283489096573206
-0.29283489096573206 x 100 = -29.28%