-4.78% is the change from 418 to 398
Calculation steps:
[( 398 - 418 ) ÷ 418] x 100 = -4.78%
Formula
Percentage change = [(398 - 418) / 418] x 100
Subtract the new number by the original number
398 - 418 = -20
-20 ÷ 418 = -0.04784688995215311
-0.04784688995215311 x 100 = -4.78%