-32.51% is the change from 323 to 218
Calculation steps:
[( 218 - 323 ) ÷ 323] x 100 = -32.51%
Formula
Percentage change = [(218 - 323) / 323] x 100
Subtract the new number by the original number
218 - 323 = -105
-105 ÷ 323 = -0.32507739938080493
-0.32507739938080493 x 100 = -32.51%