-20.56% is the change from 501 to 398
Calculation steps:
[( 398 - 501 ) ÷ 501] x 100 = -20.56%
Formula
Percentage change = [(398 - 501) / 501] x 100
Subtract the new number by the original number
398 - 501 = -103
-103 ÷ 501 = -0.2055888223552894
-0.2055888223552894 x 100 = -20.56%