-91.33% is the change from 323 to 28
Calculation steps:
[( 28 - 323 ) ÷ 323] x 100 = -91.33%
Formula
Percentage change = [(28 - 323) / 323] x 100
Subtract the new number by the original number
28 - 323 = -295
-295 ÷ 323 = -0.913312693498452
-0.913312693498452 x 100 = -91.33%