-28.48% is the change from 323 to 231
Calculation steps:
[( 231 - 323 ) ÷ 323] x 100 = -28.48%
Formula
Percentage change = [(231 - 323) / 323] x 100
Subtract the new number by the original number
231 - 323 = -92
-92 ÷ 323 = -0.2848297213622291
-0.2848297213622291 x 100 = -28.48%