-29.1% is the change from 323 to 229
Calculation steps:
[( 229 - 323 ) ÷ 323] x 100 = -29.1%
Formula
Percentage change = [(229 - 323) / 323] x 100
Subtract the new number by the original number
229 - 323 = -94
-94 ÷ 323 = -0.29102167182662536
-0.29102167182662536 x 100 = -29.1%