-23.21% is the change from 418 to 321
Calculation steps:
[( 321 - 418 ) ÷ 418] x 100 = -23.21%
Formula
Percentage change = [(321 - 418) / 418] x 100
Subtract the new number by the original number
321 - 418 = -97
-97 ÷ 418 = -0.23205741626794257
-0.23205741626794257 x 100 = -23.21%