-21.53% is the change from 418 to 328
Calculation steps:
[( 328 - 418 ) ÷ 418] x 100 = -21.53%
Formula
Percentage change = [(328 - 418) / 418] x 100
Subtract the new number by the original number
328 - 418 = -90
-90 ÷ 418 = -0.215311004784689
-0.215311004784689 x 100 = -21.53%