-36.45% is the change from 321 to 204
Calculation steps:
[( 204 - 321 ) ÷ 321] x 100 = -36.45%
Formula
Percentage change = [(204 - 321) / 321] x 100
Subtract the new number by the original number
204 - 321 = -117
-117 ÷ 321 = -0.3644859813084112
-0.3644859813084112 x 100 = -36.45%