-19.81% is the change from 323 to 259
Calculation steps:
[( 259 - 323 ) ÷ 323] x 100 = -19.81%
Formula
Percentage change = [(259 - 323) / 323] x 100
Subtract the new number by the original number
259 - 323 = -64
-64 ÷ 323 = -0.19814241486068113
-0.19814241486068113 x 100 = -19.81%