-18.07% is the change from 321 to 263
Calculation steps:
[( 263 - 321 ) ÷ 321] x 100 = -18.07%
Formula
Percentage change = [(263 - 321) / 321] x 100
Subtract the new number by the original number
263 - 321 = -58
-58 ÷ 321 = -0.1806853582554517
-0.1806853582554517 x 100 = -18.07%