-28.26% is the change from 322 to 231
Calculation steps:
[( 231 - 322 ) ÷ 322] x 100 = -28.26%
Formula
Percentage change = [(231 - 322) / 322] x 100
Subtract the new number by the original number
231 - 322 = -91
-91 ÷ 322 = -0.2826086956521739
-0.2826086956521739 x 100 = -28.26%