-21.08% is the change from 204 to 161
Calculation steps:
[( 161 - 204 ) ÷ 204] x 100 = -21.08%
Formula
Percentage change = [(161 - 204) / 204] x 100
Subtract the new number by the original number
161 - 204 = -43
-43 ÷ 204 = -0.2107843137254902
-0.2107843137254902 x 100 = -21.08%