-30.84% is the change from 321 to 222
Calculation steps:
[( 222 - 321 ) ÷ 321] x 100 = -30.84%
Formula
Percentage change = [(222 - 321) / 321] x 100
Subtract the new number by the original number
222 - 321 = -99
-99 ÷ 321 = -0.308411214953271
-0.308411214953271 x 100 = -30.84%